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		<h1>ĐỀ THI KSCL NĂM 2017 - 2018</h1>
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<strong><span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span lang="ES-VE" style="font-size:14.0pt">ĐỀ THI KHẢO SÁT CHẤT LƯỢNG ĐỢT 4 </span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">Năm học 2017 - 2018</span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="font-family:&#039;.VnTimeH&#039;,&#039;sans-serif&#039;">M«n to¸n 6</span></span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">Thêi gian lµm bµi 90 phót</span></span></span></span></strong></div>
<br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><i><span style="font-size:14.0pt">I.Trắc nghiệm(2 điểm)</span></i></b><b><i><span style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">:</span></span></i></b><span style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;"> <i>H·y khoanh trßn vµo ch÷ c¸i ®øng tr­íc c©u tr¶ lêi ®óng</i></span></span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><i><span style="font-size:14.0pt">Câu 1. </span></i></b></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b>&nbsp;</b><span style="font-size:14.0pt">1)<b> </b>Với a = -1; b = - 2 thì giá trị biểu thức a<sup>2</sup>.b<sup>2</sup> là:</span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; A. 1&nbsp;&nbsp; ;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; B. - 2 &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; C. 3&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; ;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; D. 4</span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">&nbsp;2) Cho<b> <span style="position:relative"><span style="top:12.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image002.gif" style="width:49px; height:41px" /></span></span></b>&nbsp;thì a bằng:</span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; A. - 6&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; ;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; B.- 4&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; ;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; C. 4&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp; ;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; D.8 </span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b>&nbsp;</b><span style="font-size:14.0pt">3) Chỉ ra đáp án <b><i><u>sai</u></i></b></span></span></span><br />
&nbsp;
<ol style="list-style-type:upper-alpha">
	<li style="margin-left:41px"><span style="font-size:12pt"><span style="tab-stops:list 60.75pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">15 phút bằng<b> </b><span style="position:relative"><span style="top:12.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image004.gif" style="width:20px; height:49px" /></span></span>&nbsp;giờ.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; ;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; B.<b> </b>20 phút bằng<b> </b><span style="position:relative"><span style="top:12.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image006.gif" style="width:18px; height:49px" /></span></span>&nbsp;giờ.</span></span></span></span></li>
</ol>
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">C. 30 phút bằng<b> </b><span style="position:relative"><span style="top:12.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image008.gif" style="width:20px; height:49px" /></span></span>&nbsp;giờ.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; ;<b>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </b>D.<b> </b>50 phút bằng<b> </b><span style="position:relative"><span style="top:12.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image008.gif" style="width:20px; height:49px" /></span></span>&nbsp;giờ.</span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">4)<b> </b></span><span style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">Tia Ot lµ tia ph©n g¸c cña <span style="position:relative"><span style="top:5.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image011.gif" style="width:32px; height:27px" /></span></span>&nbsp;khi:</span></span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">&nbsp;&nbsp;&nbsp; A. <span style="position:relative"><span style="top:5.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image013.gif" style="width:69px; height:25px" /></span></span>&nbsp;&nbsp;&nbsp;;&nbsp;&nbsp;&nbsp; B.<span style="position:relative"><span style="top:5.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image015.gif" style="width:111px; height:25px" /></span></span>&nbsp;&nbsp;&nbsp; ;&nbsp;&nbsp;&nbsp;&nbsp; C.<span style="position:relative"><span style="top:12.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image017.gif" style="width:115px; height:45px" /></span></span>&nbsp;&nbsp;&nbsp; ;&nbsp;&nbsp;&nbsp; D. <span style="position:relative"><span style="top:12.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image019.gif" style="width:75px; height:45px" /></span></span></span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><i><span style="font-size:14.0pt">Câu 2. </span></i></b><b><i><span style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">C¸c kh¼ng ®Þnh sau ®©y ®óng (§) hay sai (S)</span></span></i></b></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">&nbsp;&nbsp;&nbsp;&nbsp; 1) </span><span style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">TÝch cña 2 sè nguyªn ©m lµ mét sè nguyªn ©m.</span></span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">&nbsp;&nbsp;&nbsp;&nbsp; 2) Hai gãc kÒ bï cã tæng sè ®o b»ng 180<sup>0</sup>.</span></span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">&nbsp;&nbsp;&nbsp;&nbsp; 3) Tæng cña 2 sè nguyªn d­¬ng lµ mét sè nguyªn d­¬ng.</span></span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">&nbsp;&nbsp;&nbsp;&nbsp; 4) Tia Oy n»m gi÷a 2 tia Ox vµ Oy khi vµ chØ khi <span style="position:relative"><span style="top:5.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image021.gif" style="width:116px; height:27px" /></span></span>.</span></span></span></span><br />
<br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><i><span style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">II.T</span></span></i></b><b><i><span style="font-size:14.0pt">ự</span></i></b><b><i><span style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;"> lu</span></span></i></b><b><i><span style="font-size:14.0pt">ậ</span></i></b><b><i><span style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">n(8 </span></span></i></b><b><i><span style="font-size:14.0pt">đ</span></i></b><b><i><span style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">i</span></span></i></b><b><i><span style="font-size:14.0pt">ể</span></i></b><b><i><span style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">m)</span></span></i></b></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><i><span style="font-size:14.0pt">Câu 5(2 điểm).</span></i></b><span style="font-size:14.0pt"> Thực hiện phép tính:</span></span></span><br />
<span style="font-size:12pt"><span style="tab-stops:0in 5.65pt 14.0pt 28.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp; &nbsp; <span style="position:relative"><span style="top:12.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image023.gif" style="width:79px; height:41px" /></span></span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;;&nbsp;&nbsp;&nbsp;&nbsp; <span style="position:relative"><span style="top:12.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image025.gif" style="width:119px; height:41px" /></span></span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <span style="position:relative"><span style="top:12.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image027.gif" style="width:95px; height:41px" /></span></span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <span style="position:relative"><span style="top:12.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image029.gif" style="width:160px; height:41px" /></span></span></span></span></span><br />
<br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><i><span style="font-size:14.0pt">Câu 6(2 điểm).</span></i></b><span style="font-size:14.0pt"> Tìm x, biết:</span></span></span><br />
<span style="font-size:12pt"><span style="tab-stops:0in 5.65pt 14.0pt 28.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="position:relative"><span style="top:12.0pt">&nbsp;&nbsp;&nbsp;&nbsp; <img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image031.gif" style="width:84px; height:41px" />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span></span>; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span style="position:relative"><span style="top:12.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image033.gif" style="width:75px; height:41px" /></span></span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; c)<span style="font-size:13.0pt"><span style="position:relative"><span style="top:12.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image035.gif" style="width:79px; height:41px" /></span></span></span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; ;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <span style="position:relative"><span style="top:12.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image037.gif" style="width:103px; height:41px" /></span></span></span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><i><span style="font-size:14.0pt">Câu 7(3 điểm).</span></i></b></span></span><br />
<span style="font-size:12pt"><span style="tab-stops:0in 5.65pt 14.0pt 28.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">&nbsp;&nbsp;&nbsp; Trên cùng một nửa mặt phẳng có bờ là đường thẳng chứa tia Ox, vẽ 2 tia Oy và Oz sao cho <span style="position:relative"><span style="top:5.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image039.gif" style="width:147px; height:27px" /></span></span>.&nbsp; </span></span></span></span><br />
<span style="font-size:12pt"><span style="tab-stops:0in 5.65pt 14.0pt 28.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; a) Tính <span style="position:relative"><span style="top:5.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image041.gif" style="width:32px; height:27px" /></span></span>?</span></span></span></span><br />
<span style="font-size:12pt"><span style="tab-stops:0in 5.65pt 14.0pt 28.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; b) Vẽ tia Om là tia phân giác của <span style="position:relative"><span style="top:5.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image041.gif" style="width:32px; height:27px" /></span></span>. Tính <span style="position:relative"><span style="top:5.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image043.gif" style="width:36px; height:27px" /></span></span>và <span style="position:relative"><span style="top:3.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image045.gif" style="width:37px; height:24px" /></span></span>?</span></span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><i><span style="font-size:14.0pt">Câu 8(1 điểm).</span></i></b></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span lang="ES-VE" style="font-size:14.0pt">&nbsp;&nbsp;&nbsp;&nbsp; Cho biểu thức A =&nbsp; </span><span style="font-size:14.0pt"><span style="position:relative"><span style="top:12.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image047.gif" style="width:46px; height:41px" /></span></span></span><span lang="ES-VE" style="font-size:14.0pt">&nbsp;với </span><span style="font-size:14.0pt"><span style="position:relative"><span style="top:3.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image049.gif" style="width:40px; height:19px" /></span></span></span></span></span><br />
&nbsp;
<ol style="list-style-type:lower-alpha">
	<li style="margin-left:32px"><span style="font-size:12pt"><span style="tab-stops:list .75in"><span style="font-family:&#039;Times New Roman&#039;,serif"><span lang="ES-VE" style="font-size:14.0pt">Với giá trị nào của n thì A là phân số?</span></span></span></span></li>
	<li style="margin-left:32px"><span style="font-size:12pt"><span style="tab-stops:list .75in"><span style="font-family:&#039;Times New Roman&#039;,serif"><span lang="ES-VE" style="font-size:14.0pt">Tìm các giá trị của n để A là số nguyên tố.</span></span></span></span></li>
</ol>
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <span lang="ES-VE" style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">-----------------------------------------------------------</span></span></span></span><br />
<br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span lang="ES-VE" style="font-size:16.0pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<b><i>Hướng dẫn chấm Toán 6</i></b></span></span></span><br />
<br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><i><span lang="ES-VE" style="font-size:14.0pt">I.Trắc nghiệm (2 điểm)</span></i></b></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span lang="ES-VE" style="font-size:14.0pt">Mỗi ý đúng được 0,25 điểm</span></span></span><br />
<br />
&nbsp;
<table class="Table" style="border-collapse:collapse; border:none">
	<tbody>
		<tr>
			<td style="border-bottom:1px solid black; width:118px; padding:0in 7px 0in 7px; border-top:1px solid black; border-right:1px solid black; border-left:1px solid black" valign="top"><span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">Câu 1</span></span></span></td>
			<td style="border-bottom:1px solid black; width:118px; padding:0in 7px 0in 7px; border-top:1px solid black; border-right:1px solid black; border-left:none" valign="top"><span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">1</span></span></span></td>
			<td style="border-bottom:1px solid black; width:118px; padding:0in 7px 0in 7px; border-top:1px solid black; border-right:1px solid black; border-left:none" valign="top"><span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">2</span></span></span></td>
			<td style="border-bottom:1px solid black; width:118px; padding:0in 7px 0in 7px; border-top:1px solid black; border-right:1px solid black; border-left:none" valign="top"><span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">3</span></span></span></td>
			<td style="border-bottom:1px solid black; width:118px; padding:0in 7px 0in 7px; border-top:1px solid black; border-right:1px solid black; border-left:none" valign="top"><span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">4</span></span></span></td>
		</tr>
		<tr>
			<td style="border-bottom:1px solid black; width:118px; padding:0in 7px 0in 7px; border-top:none; border-right:1px solid black; border-left:1px solid black" valign="top"><span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">Đáp án</span></span></span></td>
			<td style="border-bottom:1px solid black; width:118px; padding:0in 7px 0in 7px; border-top:none; border-right:1px solid black; border-left:none" valign="top"><span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">D</span></span></span></td>
			<td style="border-bottom:1px solid black; width:118px; padding:0in 7px 0in 7px; border-top:none; border-right:1px solid black; border-left:none" valign="top"><span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">B</span></span></span></td>
			<td style="border-bottom:1px solid black; width:118px; padding:0in 7px 0in 7px; border-top:none; border-right:1px solid black; border-left:none" valign="top"><span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">D</span></span></span></td>
			<td style="border-bottom:1px solid black; width:118px; padding:0in 7px 0in 7px; border-top:none; border-right:1px solid black; border-left:none" valign="top"><span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">C</span></span></span></td>
		</tr>
		<tr>
			<td style="border-bottom:1px solid black; width:118px; padding:0in 7px 0in 7px; border-top:none; border-right:1px solid black; border-left:1px solid black" valign="top"><span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">Câu 2</span></span></span></td>
			<td style="border-bottom:1px solid black; width:118px; padding:0in 7px 0in 7px; border-top:none; border-right:1px solid black; border-left:none" valign="top"><span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">1</span></span></span></td>
			<td style="border-bottom:1px solid black; width:118px; padding:0in 7px 0in 7px; border-top:none; border-right:1px solid black; border-left:none" valign="top"><span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">2</span></span></span></td>
			<td style="border-bottom:1px solid black; width:118px; padding:0in 7px 0in 7px; border-top:none; border-right:1px solid black; border-left:none" valign="top"><span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">3</span></span></span></td>
			<td style="border-bottom:1px solid black; width:118px; padding:0in 7px 0in 7px; border-top:none; border-right:1px solid black; border-left:none" valign="top"><span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">4</span></span></span></td>
		</tr>
		<tr>
			<td style="border-bottom:1px solid black; width:118px; padding:0in 7px 0in 7px; border-top:none; border-right:1px solid black; border-left:1px solid black" valign="top"><span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">Đáp án</span></span></span></td>
			<td style="border-bottom:1px solid black; width:118px; padding:0in 7px 0in 7px; border-top:none; border-right:1px solid black; border-left:none" valign="top"><span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">S</span></span></span></td>
			<td style="border-bottom:1px solid black; width:118px; padding:0in 7px 0in 7px; border-top:none; border-right:1px solid black; border-left:none" valign="top"><span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">Đ</span></span></span></td>
			<td style="border-bottom:1px solid black; width:118px; padding:0in 7px 0in 7px; border-top:none; border-right:1px solid black; border-left:none" valign="top"><span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">Đ</span></span></span></td>
			<td style="border-bottom:1px solid black; width:118px; padding:0in 7px 0in 7px; border-top:none; border-right:1px solid black; border-left:none" valign="top"><span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">S</span></span></span></td>
		</tr>
	</tbody>
</table>
<br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><i><span style="font-size:14.0pt">II.Tự luận (8 điểm)</span></i></b></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><i><span style="font-size:14.0pt">Câu 5(2 điểm).</span></i></b><span style="font-size:14.0pt"> Mỗi câu đúng cho 0,5 đ.</span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">&nbsp;&nbsp;&nbsp;&nbsp; a) <span style="position:relative"><span style="top:12.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image051.gif" style="width:24px; height:41px" /></span></span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;b) <span style="position:relative"><span style="top:12.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image053.gif" style="width:16px; height:41px" /></span></span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; c) 1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; ;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; d) -2</span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><i><span style="font-size:14.0pt">Câu 6(2 điểm).</span></i></b><span style="font-size:14.0pt"> Mỗi câu đúng cho 0,5 đ</span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; a) x= <span style="position:relative"><span style="top:12.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image055.gif" style="width:40px; height:41px" /></span></span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;b) x=<span style="position:relative"><span style="top:12.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image057.gif" style="width:20px; height:41px" /></span></span>&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;c) x= <span style="position:relative"><span style="top:12.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image059.gif" style="width:24px; height:41px" /></span></span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; d) x=1 hoặc -7&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><i><span style="font-size:14.0pt">Câu 7(3 điểm).</span></i></b><b> </b><span style="font-size:14.0pt">Vẽ hình đúng đến câu a) cho 0,5 đ.</span></span></span><br />
<span style="font-size:12pt"><span style="tab-stops:317.25pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">&nbsp;&nbsp; a) Trên nửa mặt bờ chứa tia Ox , <span style="position:relative"><span style="top:5.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image061.gif" style="width:73px; height:27px" /></span></span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(0,25đ)</span></span></span></span><br />
<span style="font-size:12pt"><span style="tab-stops:317.25pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; nên tia Oy nằm giữa hai tia Ox và Oz&nbsp; </span></span></span></span><br />
<span style="font-size:12pt"><span style="tab-stops:317.25pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <span style="position:relative"><span style="top:3.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image063.gif" style="width:20px; height:16px" /></span></span>&nbsp;<span style="position:relative"><span style="top:5.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image065.gif" style="width:116px; height:27px" /></span></span>&nbsp;<span style="position:relative"><span style="top:5.0pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(0,5đ)</span></span></span></span></span></span><br />
<span style="font-size:12pt"><span style="tab-stops:317.25pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <span style="position:relative"><span style="top:3.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image063.gif" style="width:20px; height:16px" /></span></span>&nbsp;tính được <span style="position:relative"><span style="top:5.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image067.gif" style="width:68px; height:27px" /></span></span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(0,5đ)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span></span></span><br />
<span style="font-size:12pt"><span style="tab-stops:317.25pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">&nbsp; b)&nbsp; Lập luận tính được <span style="position:relative"><span style="top:5.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image043.gif" style="width:36px; height:27px" /></span></span>&nbsp;= 45<sup>o</sup>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (0,5đ)</span></span></span></span><br />
<span style="font-size:12pt"><span style="tab-stops:317.25pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Lập luận tính được <span style="position:relative"><span style="top:3.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image045.gif" style="width:37px; height:24px" /></span></span>&nbsp;= 85<sup>o</sup>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (0,75đ)</span></span></span></span><br />
<span style="font-size:12pt"><span style="tab-stops:317.25pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><i><span lang="FR" style="font-size:14.0pt">Câu 8(1 điểm).</span></i></b><i>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </i></span></span></span><br />
<span style="font-size:12pt"><span style="tab-stops:317.25pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span lang="FR" style="font-size:14.0pt">&nbsp;&nbsp;&nbsp; a) Để A là phân số thì </span><span style="font-size:14.0pt"><span style="position:relative"><span style="top:3.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image069.gif" style="width:112px; height:19px" /></span></span></span></span></span></span><br />
<span style="font-size:12pt"><span style="tab-stops:317.25pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span lang="FR" style="font-size:14.0pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Vậy với&nbsp; </span><span style="font-size:14.0pt"><span style="position:relative"><span style="top:3.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image071.gif" style="width:37px; height:19px" /></span></span></span><span style="font-size:14.0pt">&nbsp;thì A là phân số.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(0,5đ)</span></span></span></span><br />
<span style="font-size:12pt"><span style="tab-stops:317.25pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span lang="FR" style="font-size:14.0pt">&nbsp;&nbsp; &nbsp;b) Để A là số nguyên tố thì A phải là số tự nhiên do đó&nbsp; 2n - </span><span style="font-size:14.0pt"><span style="position:relative"><span style="top:3.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image073.gif" style="width:49px; height:20px" /></span></span></span></span></span></span><br />
<span style="font-size:12pt"><span style="tab-stops:317.25pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span lang="FR" style="font-size:14.0pt"><span style="position:relative"><span style="top:3.0pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; S</span></span></span><span lang="ES-VE" style="font-size:14.0pt"><span style="position:relative"><span style="top:3.0pt">uy ra 2(n - 4) + 5 </span></span></span><span style="font-size:14.0pt"><span style="position:relative"><span style="top:3.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image075.gif" style="width:40px; height:20px" /></span></span></span></span></span></span><br />
<span style="font-size:12pt"><span style="tab-stops:317.25pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span lang="ES-VE" style="font-size:14.0pt"><span style="position:relative"><span style="top:3.0pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Vì 2(n - 4) </span></span></span><span style="font-size:14.0pt"><span style="position:relative"><span style="top:3.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image075.gif" style="width:40px; height:20px" /></span></span></span><span lang="ES-VE" style="font-size:14.0pt"><span style="position:relative"><span style="top:3.0pt">&nbsp;nên&nbsp; 5 </span></span></span><span style="font-size:14.0pt"><span style="position:relative"><span style="top:3.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image075.gif" style="width:40px; height:20px" /></span></span></span><span lang="ES-VE" style="font-size:14.0pt"><span style="position:relative"><span style="top:3.0pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(0,25đ)</span></span></span></span></span></span><br />
<span style="font-size:12pt"><span style="tab-stops:317.25pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;<span style="font-size:14.0pt"><span style="position:relative"><span style="top:3.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image077.gif" style="width:47px; height:19px" /></span></span></span><span lang="ES-VE" style="font-size:14.0pt"><span style="position:relative"><span style="top:3.0pt">&nbsp;Ư(5) = </span></span></span><span lang="ES-VE" style="font-size:14.0pt"><span style="position:relative"><span style="top:7.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image079.gif" style="width:79px; height:27px" /></span></span></span></span></span></span><br />
<span style="font-size:12pt"><span style="tab-stops:317.25pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <span lang="FR" style="font-size:14.0pt">Tính A và kết luận n <span style="position:relative"><span style="top:7.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image081.gif" style="width:49px; height:27px" /></span></span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span style="position:relative"><span style="top:7.0pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(0,25đ) </span></span></span></span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <span lang="FR" style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">----------------------------------------------------------------</span></span></span></span><br />
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<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><span lang="FR" style="font-size:14.0pt"><span style="font-family:&#039;.VnTimeH&#039;,&#039;sans-serif&#039;">§</span></span></b><b><span lang="FR" style="font-size:14.0pt">Ề</span></b><b><span lang="FR" style="font-size:14.0pt"><span style="font-family:&#039;.VnTimeH&#039;,&#039;sans-serif&#039;"> thi </span></span></b><b><span lang="FR" style="font-size:14.0pt">KHẢO SÁT CHẤT LƯỢNG</span></b><b><span lang="FR" style="font-size:14.0pt"><span style="font-family:&#039;.VnTimeH&#039;,&#039;sans-serif&#039;"> ®ît 4</span></span></b></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span lang="FR" style="font-size:14.0pt">Năm học 2017 - 2018</span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><span style="font-size:16.0pt"><span style="font-family:&#039;.VnTimeH&#039;,&#039;sans-serif&#039;">M«n to¸n 7</span></span></b></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">Thêi gian lµm bµi 90 phót</span></span></span></span><br />
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<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><i><span style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">I. Tr¾c nghiÖm(2®i</span></span></i></b><b><i><span style="font-size:14.0pt">ểm</span></i></b><b><i><span style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">):</span></span></i></b><span style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;"> <i>H·y khoanh trßn vµo ch÷ c¸i ®øng tr­íc c©u tr¶ lêi ®óng</i></span></span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><i><span style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">C©u 1. </span></span></i></b><span style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">BiÓu thøc x<sup>2</sup> – 3x + 5 t¹i x = 2 c</span></span><span style="font-size:14.0pt">ó giá trị là:</span></span></span><br />
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<ol style="list-style-type:upper-alpha">
	<li style="margin-left:8px"><span style="font-size:12pt"><span style="tab-stops:list .5in"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">-15&nbsp;&nbsp; ;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; B. 15&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; ;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; C. 3&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; ;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; D. – 5 </span></span></span></span></li>
</ol>
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><i><span style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">C©u 2. </span></span></i></b><span style="font-size:14.0pt">Kết quả đúng của ( 5x<sup>3</sup> – 3x + 1) – ( 2x<sup>2</sup> + 4x – 1) = ?</span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">&nbsp;&nbsp;&nbsp; A. </span><span style="font-size:14.0pt">5x<sup>3</sup> - 2x<sup>2</sup> – 7x + 2&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; ;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; B. 5x<sup>3</sup> + 2x<sup>2</sup> – 7x + 2&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">&nbsp;&nbsp;&nbsp; C. 5x<sup>3</sup> - 2x<sup>2</sup> + 7x + 2&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; ;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; D. 5x<sup>3</sup> - 2x<sup>2</sup> – 7x - 2&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><i><span style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">C©u 3:</span></span></i></b><span style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;"> BiÓu thøc nµo ®­îc gäi lµ ®¬n thøc?</span></span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp; <span lang="ES-VE" style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">A. ( 2 + x).y&nbsp;&nbsp;&nbsp; ;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; B. y<sup>2</sup> – 1&nbsp;&nbsp;&nbsp; ;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; C. – 8&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; ;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; D. 2x + 3</span></span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><i><span lang="ES-VE" style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">C©u 4:</span></span></i></b><span lang="ES-VE" style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;"> §¬n thøc nµo sau ®©y ®ång d¹ng víi ®¬n thøc </span></span><span style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;"><span style="position:relative"><span style="top:12.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image083.gif" style="width:39px; height:41px" /></span></span></span></span><span lang="ES-VE" style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">&nbsp;?</span></span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span lang="ES-VE" style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">&nbsp;&nbsp;&nbsp;&nbsp; A. </span></span><span style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;"><span style="position:relative"><span style="top:12.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image085.gif" style="width:41px; height:41px" /></span></span></span></span><span lang="ES-VE" style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; B. </span></span><span style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;"><span style="position:relative"><span style="top:12.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image087.gif" style="width:47px; height:41px" /></span></span></span></span><span lang="ES-VE" style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; C. </span></span><span style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;"><span style="position:relative"><span style="top:12.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image089.gif" style="width:47px; height:41px" /></span></span></span></span><span lang="ES-VE" style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;;&nbsp;&nbsp;&nbsp;&nbsp; D. (xy)<sup>3</sup></span></span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><i><span lang="ES-VE" style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">C©u 5:</span></span></i></b><span lang="ES-VE" style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;"> BËc cña ®a thøc&nbsp; P = 2x<sup>5</sup>- 3x<sup>3</sup>y + 2xy<sup>5</sup> + 1 lµ:</span></span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span lang="ES-VE" style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">&nbsp;&nbsp;&nbsp;&nbsp; A. 6&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; ;&nbsp;&nbsp;&nbsp;&nbsp; B. 5&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; ;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; C. 4&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; ;&nbsp;&nbsp;&nbsp;&nbsp; D. 15</span></span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><i><span lang="ES-VE" style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">C©u 6:</span></span></i></b><span lang="ES-VE" style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;"> Cho </span></span><span style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;"><span style="position:relative"><span style="top:3.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image091.gif" style="width:45px; height:19px" /></span></span></span></span><span lang="ES-VE" style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">&nbsp;c©n ë A vµ cã </span></span><span style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;"><span style="position:relative"><span style="top:2.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image093.gif" style="width:16px; height:23px" /></span></span></span></span><span lang="ES-VE" style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">= 70<sup>0</sup> th× sè ®o cña </span></span><span style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;"><span style="position:relative"><span style="top:2.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image095.gif" style="width:16px; height:23px" /></span></span></span></span><span lang="ES-VE" style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">&nbsp;lµ:</span></span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span lang="ES-VE" style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; A. 30<sup>0</sup>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; ;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; B. 20<sup>0</sup>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; ;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; C. 40<sup>0</sup>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; ;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; D. 60<sup>0</sup></span></span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><i><span lang="ES-VE" style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">C©u 7:</span></span></i></b><span lang="ES-VE" style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;"> Chän c©u </span></span><b><i><u><span lang="ES-VE" style="font-size:16.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">sai</span></span></u></i></b><span lang="ES-VE" style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;"> trong c¸c c©u sau:</span></span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span lang="ES-VE" style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">&nbsp;&nbsp;&nbsp;&nbsp; A.Trong mét tam gi¸c, gãc ®èi diÖn víi c¹nh lín h¬n lµ gãc lín h¬n.</span></span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span lang="ES-VE" style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">&nbsp;&nbsp;&nbsp;&nbsp; B. Trong mét tam gi¸c, c¹nh ®èi diÖn víi gãc nhá h¬n lµ c¹nh lín h¬n.</span></span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span lang="ES-VE" style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">&nbsp;&nbsp;&nbsp;&nbsp; C Trong c¸c ®­êng xiªn vµ ®­êng vu«ng gãc kÎ tõ mét ®iÓm ë ngoµi mét ®­êng th¼ng ®Õn ®­êng th¼ng ®ã, ®­êng vu«ng gãc lµ ®­êng ng¾n nhÊt.</span></span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><i><span style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">C©u 8. </span></span></i></b><span style="font-size:14.0pt">Hãy chọn câu <b><i><u>sai </u></i></b>trong các câu sau: </span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">&nbsp;&nbsp;&nbsp; A. Để tính giá trị của một biểu thức đại số tại những giá trị cho trước của các biến, ta thay giá trị cho trước đó vào biểu thức rồi thực hiện các phép tính.</span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">&nbsp;&nbsp;&nbsp; B. Đơn thức là biểu thức đại số chỉ gồm một số, hoặc một biến, hoặc một tích giữa các số và các biến.</span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">&nbsp;&nbsp; &nbsp;C. Bậc của đơn thức là tổng số mũ của tất cả các biến có trong đơn thức đó.</span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">&nbsp;&nbsp; &nbsp;D. Hai đơn thức đồng dạng là hai đơn thức có hệ số khác 0 và cùng phần biến.</span></span></span><br />
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<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><i><span style="font-size:14.0pt">II. Phần tự luận(8đ): </span></i></b></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><i><span style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">C©u 9(2 </span></span></i></b><b><i><span style="font-size:14.0pt">điểm):</span></i></b></span></span><br />
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<ol style="list-style-type:lower-alpha">
	<li style="margin-left:8px"><span style="font-size:12pt"><span style="tab-stops:list .5in"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">Thực hiện phép tính: (- 6).10 : &#91;- 0,25 + <span style="position:relative"><span style="top:12.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image097.gif" style="width:16px; height:41px" /></span></span>: (- 2)&#93; + 1<span style="position:relative"><span style="top:12.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image053.gif" style="width:16px; height:41px" /></span></span></span></span></span></span></li>
	<li style="margin-left:8px"><span style="font-size:12pt"><span style="tab-stops:list .5in"><span style="font-family:&#039;Times New Roman&#039;,serif"><span lang="NL" style="font-size:14.0pt">Tìm x, biết: ( 4x – 3) – ( x + 5) = ( x + 2) – 2(x – 10)</span></span></span></span></li>
</ol>
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><i><span style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">C©u 10 (3 ®iÓm):</span></span></i></b><span style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;"> Thu gän c¸c biÓu thøc sau:</span></span></span></span><br />
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<ol style="list-style-type:lower-alpha">
	<li style="margin-left:8px"><span style="font-size:12pt"><span style="tab-stops:list .5in"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">( 2x<sup>3</sup>y<sup>7</sup>).(<span style="position:relative"><span style="top:12.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image100.gif" style="width:53px; height:41px" /></span></span>) = ?</span></span></span></span></span></li>
	<li style="margin-left:8px"><span style="font-size:12pt"><span style="tab-stops:list .5in"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">3xy<sup>2</sup> + 2xy<sup>2</sup> – 37xy<sup>2 </sup>&nbsp;= ?</span></span></span></span></span></li>
	<li style="margin-left:8px"><span style="font-size:12pt"><span style="tab-stops:list .5in"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;"><span style="position:relative"><span style="top:12.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image102.gif" style="width:181px; height:41px" /></span></span>&nbsp;= ?</span></span></span></span></span></li>
</ol>
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;<b><i><span style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">C©u 11(</span></span></i></b><b><i><span style="font-size:14.0pt">2điểm)</span></i></b><b><i><span style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">.</span></span></i></b><span style="font-size:14.0pt"> Điểm kiểm tra 1 tiết môn Toán của lớp 7E được ghi lại trong bảng sau:</span></span></span><br />
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<table class="MsoTableGrid" style="margin-left:94px; border-collapse:collapse; border:none">
	<tbody>
		<tr>
			<td style="border-bottom:1px solid black; width:400px; padding:0in 7px 0in 7px; height:107px; border-top:1px solid black; border-right:1px solid black; border-left:1px solid black" valign="top"><span style="font-size:12pt"><span style="tab-stops:1.75in center 241.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">8&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 5&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 8&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 6&nbsp;&nbsp;&nbsp; &nbsp; 7&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 4&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 5&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 6</span></span></span></span><br />
			<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">3&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 6&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 2&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 3&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 6&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 4&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 2&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 8&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 3</span></span></span><br />
			<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">3&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 7&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 8&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 10&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 4&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 7&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;7&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 7&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 3</span></span></span><br />
			<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">9&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 9&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 7&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 9&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 3&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 9&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 5&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 5&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 5</span></span></span><br />
			<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">5&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 5&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 7&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 9&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 5&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 8&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 8&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 5&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 5</span></span></span></td>
		</tr>
	</tbody>
</table>
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<ol style="list-style-type:lower-alpha">
	<li style="margin-left:8px"><span style="font-size:12pt"><span style="tab-stops:list .5in"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">Dấu hiệu điều tra là gì?</span></span></span></span></li>
	<li style="margin-left:8px"><span style="font-size:12pt"><span style="tab-stops:list .5in"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">Lập bảng “ Tần số” và tính số trung bình cộng ?</span></span></span></span></li>
	<li style="margin-left:8px"><span style="font-size:12pt"><span style="tab-stops:list .5in"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">Tìm mốt của dấu hiệu ?</span></span></span></span></li>
</ol>
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><i><span style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">C©u 12 (2,5 ®iÓm):</span></span></i></b><span style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">&nbsp; Cho <span style="position:relative"><span style="top:3.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image091.gif" style="width:45px; height:19px" /></span></span>c©n ë A, cã D lµ trung ®iÓm cña c¹nh BC. Tõ D kÎ<span style="position:relative"><span style="top:5.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image104.gif" style="width:136px; height:21px" /></span></span>. CMR:</span></span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">&nbsp;&nbsp;&nbsp;&nbsp; a) <span style="position:relative"><span style="top:3.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image106.gif" style="width:105px; height:19px" /></span></span></span></span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">&nbsp;&nbsp;&nbsp;&nbsp; b) <span style="position:relative"><span style="top:2.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image108.gif" style="width:105px; height:17px" /></span></span></span></span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">&nbsp;&nbsp;&nbsp;&nbsp; c) AD lµ tia ph©n gi¸c cña <span style="position:relative"><span style="top:3.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image110.gif" style="width:37px; height:24px" /></span></span>?</span></span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><i><span lang="NL" style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">C©u 13(0,5</span></span></i></b><b><i><span lang="NL" style="font-size:14.0pt">điểm)</span></i></b><b><i><span lang="NL" style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">.</span></span></i></b><span lang="NL" style="font-size:14.0pt"> Tìm x, biết: </span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span lang="NL" style="font-size:14.0pt">&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span style="position:relative"><span style="top:12.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image112.gif" style="width:188px; height:41px" /></span></span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <span lang="NL" style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">------------------------------------------------------------</span></span></span></span><br />
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<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span></span><br />
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<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <span style="font-size:16.0pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<b><i>Hướng dẫn chấm Toán 7</i></b></span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;</span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><i><span style="font-size:14.0pt">I. Trắc nghiệm (2 đểm):</span></i></b><span style="font-size:14.0pt"> Mỗi câu đúng được 0,25 điểm</span></span></span><br />
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<table class="MsoTableGrid" style="border-collapse:collapse; border:none">
	<tbody>
		<tr>
			<td style="border-bottom:1px solid black; width:69px; padding:0in 7px 0in 7px; height:21px; border-top:1px solid black; border-right:1px solid black; border-left:1px solid black" valign="top"><span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">Câu</span></span></span></td>
			<td style="border-bottom:1px solid black; width:69px; padding:0in 7px 0in 7px; height:21px; border-top:1px solid black; border-right:1px solid black; border-left:none" valign="top"><span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">1</span></span></span></td>
			<td style="border-bottom:1px solid black; width:69px; padding:0in 7px 0in 7px; height:21px; border-top:1px solid black; border-right:1px solid black; border-left:none" valign="top"><span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">2</span></span></span></td>
			<td style="border-bottom:1px solid black; width:69px; padding:0in 7px 0in 7px; height:21px; border-top:1px solid black; border-right:1px solid black; border-left:none" valign="top"><span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">3</span></span></span></td>
			<td style="border-bottom:1px solid black; width:69px; padding:0in 7px 0in 7px; height:21px; border-top:1px solid black; border-right:1px solid black; border-left:none" valign="top"><span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">4</span></span></span></td>
			<td style="border-bottom:1px solid black; width:69px; padding:0in 7px 0in 7px; height:21px; border-top:1px solid black; border-right:1px solid black; border-left:none" valign="top"><span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">5</span></span></span></td>
			<td style="border-bottom:1px solid black; width:69px; padding:0in 7px 0in 7px; height:21px; border-top:1px solid black; border-right:1px solid black; border-left:none" valign="top"><span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">6</span></span></span></td>
			<td style="border-bottom:1px solid black; width:69px; padding:0in 7px 0in 7px; height:21px; border-top:1px solid black; border-right:1px solid black; border-left:none" valign="top"><span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">7</span></span></span></td>
			<td style="border-bottom:1px solid black; width:69px; padding:0in 7px 0in 7px; height:21px; border-top:1px solid black; border-right:1px solid black; border-left:none" valign="top"><span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">8</span></span></span></td>
		</tr>
		<tr>
			<td style="border-bottom:1px solid black; width:69px; padding:0in 7px 0in 7px; height:21px; border-top:none; border-right:1px solid black; border-left:1px solid black" valign="top"><span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">Đáp án</span></span></span></td>
			<td style="border-bottom:1px solid black; width:69px; padding:0in 7px 0in 7px; height:21px; border-top:none; border-right:1px solid black; border-left:none" valign="top"><span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">C</span></span></span></td>
			<td style="border-bottom:1px solid black; width:69px; padding:0in 7px 0in 7px; height:21px; border-top:none; border-right:1px solid black; border-left:none" valign="top"><span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">A</span></span></span></td>
			<td style="border-bottom:1px solid black; width:69px; padding:0in 7px 0in 7px; height:21px; border-top:none; border-right:1px solid black; border-left:none" valign="top"><span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">C</span></span></span></td>
			<td style="border-bottom:1px solid black; width:69px; padding:0in 7px 0in 7px; height:21px; border-top:none; border-right:1px solid black; border-left:none" valign="top"><span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">B</span></span></span></td>
			<td style="border-bottom:1px solid black; width:69px; padding:0in 7px 0in 7px; height:21px; border-top:none; border-right:1px solid black; border-left:none" valign="top"><span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">A</span></span></span></td>
			<td style="border-bottom:1px solid black; width:69px; padding:0in 7px 0in 7px; height:21px; border-top:none; border-right:1px solid black; border-left:none" valign="top"><span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">C</span></span></span></td>
			<td style="border-bottom:1px solid black; width:69px; padding:0in 7px 0in 7px; height:21px; border-top:none; border-right:1px solid black; border-left:none" valign="top"><span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">B</span></span></span></td>
			<td style="border-bottom:1px solid black; width:69px; padding:0in 7px 0in 7px; height:21px; border-top:none; border-right:1px solid black; border-left:none" valign="top"><span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">C</span></span></span></td>
		</tr>
	</tbody>
</table>
<br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><i><span style="font-size:14.0pt">II. Tự luận (8 điểm): </span></i></b></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><i><span style="font-size:14.0pt">Câu 9(2 điểm).</span></i></b></span></span><br />
&nbsp;
<ol style="list-style-type:lower-alpha">
	<li style="margin-left:8px"><span style="font-size:12pt"><span style="tab-stops:list .5in"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">Kết quả = <span style="position:relative"><span style="top:12.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image114.gif" style="width:32px; height:41px" /></span></span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(1 điểm)</span></span></span></span></li>
	<li style="margin-left:8px"><span style="font-size:12pt"><span style="tab-stops:list .5in"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">Kết quả x = 7,5&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (1 điểm)</span></span></span></span></li>
</ol>
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><i><span style="font-size:14.0pt">Câu 10(3 điểm).</span></i></b><span style="font-size:14.0pt"> Tìm x, biết:</span></span></span><br />
&nbsp;
<ol style="list-style-type:lower-alpha">
	<li style="margin-left:8px"><span style="font-size:12pt"><span style="tab-stops:list .5in"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">Kết quả&nbsp; = <span style="position:relative"><span style="top:12.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image097.gif" style="width:16px; height:41px" /></span></span>x<sup>7</sup>y<sup>12</sup>z&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (1 điểm)</span></span></span></span></li>
	<li style="margin-left:8px"><span style="font-size:12pt"><span style="tab-stops:list .5in"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">Kết quả&nbsp; = - 32xy<sup>2</sup>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(1 điểm)</span></span></span></span></li>
	<li style="margin-left:8px"><span style="font-size:12pt"><span style="tab-stops:list .5in"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">Kết quả&nbsp; = <span style="position:relative"><span style="top:12.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image117.gif" style="width:21px; height:41px" /></span></span>x<sup>2</sup>y&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (1 điểm)</span></span></span></span></li>
</ol>
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><i><span style="font-size:14.0pt">Câu 11(2 điểm).</span></i></b></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">a)Dấu hiệu điều tra: Điểm kiểm tra 1 tiết môn Toán của mỗi HS lớp 7E.&nbsp;&nbsp; (0,5 điểm)</span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">&nbsp;&nbsp;&nbsp;&nbsp; b)Lập bảng “tần số” và tính được <span style="position:relative"><span style="top:5.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image119.gif" style="width:55px; height:25px" /></span></span>.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (1 điểm)</span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">&nbsp;&nbsp;&nbsp;&nbsp; c)</span></span><span style="font-size:14.0pt">M<sub>0</sub> = 5.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (0,5 điểm)</span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><i><span style="font-size:14.0pt">Câu 12(2,5 điểm).</span></i></b><span style="font-size:14.0pt"> Vẽ hình và ghi GT, KL đúng cho 0,5 đ.</span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">&nbsp;&nbsp;&nbsp;&nbsp; a) CM được </span><span style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;"><span style="position:relative"><span style="top:3.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image106.gif" style="width:105px; height:19px" /></span></span>(c</span></span><span style="font-size:14.0pt">ạnh huyền, góc nhọn)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (0,5 điểm)</span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp; <span lang="NL" style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">b) V</span></span><span lang="NL" style="font-size:14.0pt">ì </span><span style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;"><span style="position:relative"><span style="top:3.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image106.gif" style="width:105px; height:19px" /></span></span></span></span><span lang="NL" style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">(CMT) </span></span><span style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;"><span style="position:relative"><span style="top:3.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image063.gif" style="width:20px; height:16px" /></span></span></span></span><span lang="NL" style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">DE = DF&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span><span lang="NL" style="font-size:14.0pt">(0,5 điểm)</span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <span lang="NL" style="font-size:14.0pt">Vậy </span><span style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;"><span style="position:relative"><span style="top:2.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image108.gif" style="width:105px; height:17px" /></span></span></span></span><span lang="NL" style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">(c</span></span><span lang="NL" style="font-size:14.0pt">ạnh huyền, cạnh góc vuông)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (0,5 điểm)</span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span lang="NL" style="font-size:14.0pt">&nbsp;&nbsp;&nbsp; &nbsp;c)Vì </span><span style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;"><span style="position:relative"><span style="top:2.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image108.gif" style="width:105px; height:17px" /></span></span></span></span><span lang="NL" style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">(CMT) suy ra </span></span><span style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;"><span style="position:relative"><span style="top:3.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image122.gif" style="width:87px; height:24px" /></span></span></span></span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span lang="NL" style="font-size:14.0pt">(0,25 điểm)</span></span></span><br />
<br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <span style="font-size:14.0pt">Mà tia AD nằm giữa 2 tia AB và AC.</span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Vậy AD là tia phân giác của </span><span style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;"><span style="position:relative"><span style="top:3.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image110.gif" style="width:37px; height:24px" /></span></span>.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span><span style="font-size:14.0pt">(0,25 điểm)</span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><i><span style="font-size:14.0pt">Câu 13(0,5 điểm).</span></i></b></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span lang="NL" style="font-size:14.0pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <span style="position:relative"><span style="top:12.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image112.gif" style="width:188px; height:41px" /></span></span></span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span lang="NL" style="font-size:14.0pt"><span style="position:relative"><span style="top:12.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image124.gif" style="width:284px; height:41px" /></span></span></span><span style="font-size:14.0pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(0,25 điểm)</span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span lang="NL" style="font-size:14.0pt">&nbsp;<span style="position:relative"><span style="top:12.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image126.gif" style="width:296px; height:41px" /></span></span></span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span lang="NL" style="font-size:14.0pt"><span style="position:relative"><span style="top:14.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image128.gif" style="width:312px; height:45px" /></span></span></span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span lang="NL" style="font-size:14.0pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <span style="position:relative"><span style="top:3.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image130.gif" style="width:101px; height:19px" /></span></span></span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span lang="NL" style="font-size:14.0pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <span style="position:relative"><span style="top:3.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image132.gif" style="width:81px; height:19px" /></span></span>.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (0,25 điểm)</span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span lang="NL" style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;-------------------------------------------------------------------</span></span></span></span><br />
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<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;<b><span lang="NL" style="font-size:14.0pt"><span style="font-family:&#039;.VnTimeH&#039;,&#039;sans-serif&#039;">§</span></span></b><b><span lang="NL" style="font-size:14.0pt">Ề</span></b><b><span lang="NL" style="font-size:14.0pt"><span style="font-family:&#039;.VnTimeH&#039;,&#039;sans-serif&#039;"> thi </span></span></b><b><span lang="NL" style="font-size:14.0pt">KHẢO SÁT CHẤT LƯỢNG</span></b><b><span lang="NL" style="font-size:14.0pt"><span style="font-family:&#039;.VnTimeH&#039;,&#039;sans-serif&#039;"> ®ît 4</span></span></b></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">Năm học 2017 - 2018</span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><span style="font-size:16.0pt"><span style="font-family:&#039;.VnTimeH&#039;,&#039;sans-serif&#039;">M«n to¸n 8</span></span></b></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">Thêi gian lµm bµi 90 phót</span></span></span></span><br />
<br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><i><span style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">I. Ttr¾c nghiÖm(2®</span></span></i></b><b><i><span style="font-size:14.0pt">iểm</span></i></b><b><i><span style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">):</span></span></i></b><span style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;"> <i>H·y khoanh trßn vµo ch÷ c¸i ®øng tr­íc c©u tr¶ lêi ®óng</i></span></span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><i><span style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">C©u 1. </span></span></i></b><span style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">NghiÖm cña ph­¬ng tr×nh (x – 2)(x – 1) = 0 lµ:</span></span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; A. 2 ;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; B.&nbsp; 2 vµ 1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; ;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; C. 1&nbsp;&nbsp;&nbsp; ;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; D. 0</span></span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><i><span style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">C©u 2. </span></span></i></b><span style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">ChØ ra nghiÖm cña ph­¬ng tr×nh 2x + 12 = - x + 3</span></span></span></span><br />
&nbsp;
<ol style="list-style-type:upper-alpha">
	<li style="margin-left:22px"><span style="font-size:12pt"><span style="tab-stops:list 46.5pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">x = 1 ;&nbsp;&nbsp;&nbsp;&nbsp; B. x = - 3 ;&nbsp;&nbsp;&nbsp;&nbsp; C. x = 3 ;&nbsp;&nbsp;&nbsp;&nbsp; D. x = - 1</span></span></span></span></span></li>
</ol>
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><i><span style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">C©u3.</span></span></i></b>. X<span style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">¸c ®Þ</span></span><span style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">nh tËp nghiÖm cña ph­¬ng tr×nh x(3x – 2) = 0</span></span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span lang="NL" style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">A.S = {</span></span><span lang="NL" style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;"> 0; </span></span><span style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;"><span style="position:relative"><span style="top:12.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image134.gif" style="width:16px; height:41px" /></span></span></span></span><span lang="NL" style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">}&nbsp; ; B. S = {0 ; </span></span><span style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;"><span style="position:relative"><span style="top:12.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image136.gif" style="width:24px; height:41px" /></span></span></span></span><span lang="NL" style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">} ; C. S = {</span></span><span style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;"><span style="position:relative"><span style="top:12.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image134.gif" style="width:16px; height:41px" /></span></span></span></span><span lang="NL" style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">} ; D. S = {</span></span><span style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;"><span style="position:relative"><span style="top:12.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image136.gif" style="width:24px; height:41px" /></span></span></span></span><span lang="NL" style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">}</span></span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><i><span lang="NL" style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">C©u 4.</span></span></i></b><span lang="NL" style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;"> Cho TX§ = {x </span></span><span style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;"><span style="position:relative"><span style="top:2.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image140.gif" style="width:29px; height:17px" /></span></span></span></span><span lang="NL" style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">: x </span></span><span style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;"><span style="position:relative"><span style="top:5.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image142.gif" style="width:63px; height:21px" /></span></span></span></span><span lang="NL" style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">}</span></span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span lang="NL" style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; TX§ trªn lµ cña ph­¬ng tr×nh nµo d­íi ®©y?</span></span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <span style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">A. x(x – 3) = 0&nbsp;&nbsp;&nbsp; ;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; B. <span style="position:relative"><span style="top:14.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image144.gif" style="width:83px; height:44px" /></span></span></span></span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><i><span style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">C©u 5:</span></span></i></b><span style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;"> Ph­¬ng tr×nh nµo lµ ph­¬ng tr×nh bËc nhÊt 1 Èn?</span></span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; A. 2x.x + 5 = 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; ;&nbsp;&nbsp;&nbsp;&nbsp; B. 2x<sup>2</sup> – 1 = 0&nbsp;&nbsp;&nbsp; ;&nbsp;&nbsp; C. x + 2 = 0&nbsp;&nbsp;&nbsp;&nbsp; ;&nbsp;&nbsp;&nbsp;&nbsp; D. 2xy + 3 = 0&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;</span></span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><i><span lang="ES-VE" style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">C©u 6:</span></span></i></b><span lang="ES-VE" style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;"> H·y chän c©u </span></span><b><i><u><span lang="ES-VE" style="font-size:16.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">sai</span></span></u></i></b><span lang="ES-VE" style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;"> trong c¸c c©u sau?</span></span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span lang="ES-VE" style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; A. Trong mét ph­¬ng tr×nh ta cã thÓ chuyÓn mét h¹ng tö tõ vÕ nµy sang vÕ kia vµ ®æi dÊu h¹ng tö ®ã.</span></span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">B. NÕu a &lt; b th× a + c &lt; b + c</span></span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; C. NÕu a &lt; b vµ c &lt; 0 th× ac &gt; bc</span></span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; D. NÕu a &lt; b th× a<sup>2</sup> &lt; b<sup>2</sup>.</span></span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><i><span style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">C©u 7.</span></span></i></b><span style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;"> Cho bi</span></span><span style="font-size:14.0pt">ết <span style="position:relative"><span style="top:3.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image091.gif" style="width:45px; height:19px" /></span></span>&nbsp;đồng dạng với <span style="position:relative"><span style="top:2.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image147.gif" style="width:48px; height:17px" /></span></span>và AB = 4cm; DE = 6cm thì tỉ số đồng dạng k là:</span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <span lang="NL" style="font-size:14.0pt">A. k = </span><span style="font-size:14.0pt"><span style="position:relative"><span style="top:12.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image097.gif" style="width:16px; height:41px" /></span></span></span><span lang="NL" style="font-size:14.0pt">&nbsp;;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; B. k = </span><span style="font-size:14.0pt"><span style="position:relative"><span style="top:12.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image150.gif" style="width:16px; height:41px" /></span></span></span><span lang="NL" style="font-size:14.0pt">&nbsp;;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; C. k = </span><span style="font-size:14.0pt"><span style="position:relative"><span style="top:12.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image134.gif" style="width:16px; height:41px" /></span></span></span><span lang="NL" style="font-size:14.0pt">&nbsp;;&nbsp;&nbsp;&nbsp;&nbsp; D. k = </span><span style="font-size:14.0pt"><span style="position:relative"><span style="top:12.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image153.gif" style="width:15px; height:41px" /></span></span></span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><i><span lang="NL" style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">&nbsp;C©u 8.</span></span></i></b><span lang="NL" style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;"> Ch</span></span><span lang="NL" style="font-size:14.0pt">ọn câu <b><i>đúng </i></b>trong các câu sau:</span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span lang="NL" style="font-size:14.0pt">A. Hai tam giác đồng dạng thì bằng nhau.</span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span lang="NL" style="font-size:14.0pt">&nbsp;&nbsp;&nbsp;&nbsp; B. Tỉ số hai đường cao tương ứng của hai tam giác đồng dạng bằng bình phương tỉ số đồng dạng.</span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span lang="NL" style="font-size:14.0pt">&nbsp;&nbsp;&nbsp;&nbsp; C. Tỉ số diện tích của hai tam giác đồng dạng bằng tỉ số đồng dạng.</span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span lang="NL" style="font-size:14.0pt">&nbsp;&nbsp;&nbsp;&nbsp; D. Nếu hai góc của tam giác này lần lượt bằng hai góc của tam giác kia thì hai tam giác đó đồng dạng.</span></span></span><br />
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<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><i><span lang="NL" style="font-size:14.0pt">II. Tự luận(8 điểm):</span></i></b></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><i><span lang="NL" style="font-size:14.0pt">Câu 9(2 điểm).</span></i></b><span lang="NL" style="font-size:14.0pt"> Giải các phương trình sau:</span></span></span><br />
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<ol style="list-style-type:lower-alpha">
	<li style="margin-left:8px"><span style="font-size:12pt"><span style="tab-stops:list .5in"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">5(3x + 1) = 4x + 1</span></span></span></span></li>
	<li style="margin-left:8px"><span style="font-size:12pt"><span style="tab-stops:list .5in"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">(3x - 1)(4x + 3) = 0</span></span></span></span></li>
	<li style="margin-left:8px"><span style="font-size:12pt"><span style="tab-stops:list .5in"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="position:relative"><span style="top:14.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image155.gif" style="width:209px; height:44px" /></span></span></span></span></span></span></li>
</ol>
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><i><span style="font-size:14.0pt">Câu 10( 2,5 điểm).</span></i></b><span style="font-size:14.0pt"> Giải bài toán bằng cách lập phương trình:</span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Một người đi từ A đến B với vận tốc 24km/h rồi đi tiếp từ B đến C với vận tốc 32km/h. Tính quãng đường AB và BC, biết rằng quãng đường AB dài hơn quãng đường BC là 6km và vận tốc trung bình của người đó trên cả quãng đường AC là 27km/h.</span></span></span><br />
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<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><i><span style="font-size:14.0pt">Câu 11( 3 điểm).</span></i></b><span style="font-size:14.0pt"> Cho<span style="position:relative"><span style="top:2.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image157.gif" style="width:15px; height:17px" /></span></span>ABC vuông tại A, có AB = 4cm, AC = 3cm. Kẻ tia phân giác AH (H thuộc cạnh huyền BC), từ H kẻ HE// với AC (E<span style="position:relative"><span style="top:2.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image159.gif" style="width:13px; height:13px" /></span></span>AB).</span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <span lang="ES-VE" style="font-size:14.0pt">a) Tính diện tích của </span><span style="font-size:14.0pt"><span style="position:relative"><span style="top:2.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image157.gif" style="width:15px; height:17px" /></span></span></span><span lang="ES-VE" style="font-size:14.0pt">ABC ?</span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span lang="ES-VE" style="font-size:14.0pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; b) Tính các cạnh của <span style="position:relative"><span style="top:2.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image161.gif" style="width:47px; height:17px" /></span></span>?</span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><i><span lang="ES-VE" style="font-size:14.0pt">Câu 12( 0,5 điểm).</span></i></b><span lang="ES-VE" style="font-size:14.0pt"> Tìm x, biết:&nbsp;&nbsp; </span><span style="font-size:14.0pt"><span style="position:relative"><span style="top:12.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image163.gif" style="width:173px; height:41px" /></span></span></span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span lang="ES-VE" style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">----------------------------------------------------------------------&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span></span></span><br />
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<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span></span><br />
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<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span lang="ES-VE" style="font-size:16.0pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<b><i>Hướng dẫn chấm Toán 8</i></b></span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;</span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><i><span lang="ES-VE" style="font-size:14.0pt">I. Trắc nghiệm (2 đểm):</span></i></b><span lang="ES-VE" style="font-size:14.0pt"> Mỗi câu đúng được 0,25 điểm</span></span></span><br />
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<table class="MsoTableGrid" style="margin-left:17px; border-collapse:collapse; border:none">
	<tbody>
		<tr>
			<td style="border-bottom:1px solid black; width:75px; padding:0in 7px 0in 7px; height:25px; border-top:1px solid black; border-right:1px solid black; border-left:1px solid black" valign="top"><span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">Câu</span></span></span></td>
			<td style="border-bottom:1px solid black; width:52px; padding:0in 7px 0in 7px; height:25px; border-top:1px solid black; border-right:1px solid black; border-left:none" valign="top"><span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">1</span></span></span></td>
			<td style="border-bottom:1px solid black; width:72px; padding:0in 7px 0in 7px; height:25px; border-top:1px solid black; border-right:1px solid black; border-left:none" valign="top"><span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">2</span></span></span></td>
			<td style="border-bottom:1px solid black; width:72px; padding:0in 7px 0in 7px; height:25px; border-top:1px solid black; border-right:1px solid black; border-left:none" valign="top"><span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">3</span></span></span></td>
			<td style="border-bottom:1px solid black; width:72px; padding:0in 7px 0in 7px; height:25px; border-top:1px solid black; border-right:1px solid black; border-left:none" valign="top"><span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">4</span></span></span></td>
			<td style="border-bottom:1px solid black; width:72px; padding:0in 7px 0in 7px; height:25px; border-top:1px solid black; border-right:1px solid black; border-left:none" valign="top"><span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">5</span></span></span></td>
			<td style="border-bottom:1px solid black; width:72px; padding:0in 7px 0in 7px; height:25px; border-top:1px solid black; border-right:1px solid black; border-left:none" valign="top"><span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">6</span></span></span></td>
			<td style="border-bottom:1px solid black; width:72px; padding:0in 7px 0in 7px; height:25px; border-top:1px solid black; border-right:1px solid black; border-left:none" valign="top"><span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">7</span></span></span></td>
			<td style="border-bottom:1px solid black; width:72px; padding:0in 7px 0in 7px; height:25px; border-top:1px solid black; border-right:1px solid black; border-left:none" valign="top"><span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">8</span></span></span></td>
		</tr>
		<tr>
			<td style="border-bottom:1px solid black; width:75px; padding:0in 7px 0in 7px; height:26px; border-top:none; border-right:1px solid black; border-left:1px solid black" valign="top"><span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">Đáp án</span></span></span></td>
			<td style="border-bottom:1px solid black; width:52px; padding:0in 7px 0in 7px; height:26px; border-top:none; border-right:1px solid black; border-left:none" valign="top"><span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">B</span></span></span></td>
			<td style="border-bottom:1px solid black; width:72px; padding:0in 7px 0in 7px; height:26px; border-top:none; border-right:1px solid black; border-left:none" valign="top"><span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">B</span></span></span></td>
			<td style="border-bottom:1px solid black; width:72px; padding:0in 7px 0in 7px; height:26px; border-top:none; border-right:1px solid black; border-left:none" valign="top"><span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">A</span></span></span></td>
			<td style="border-bottom:1px solid black; width:72px; padding:0in 7px 0in 7px; height:26px; border-top:none; border-right:1px solid black; border-left:none" valign="top"><span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">B</span></span></span></td>
			<td style="border-bottom:1px solid black; width:72px; padding:0in 7px 0in 7px; height:26px; border-top:none; border-right:1px solid black; border-left:none" valign="top"><span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">C</span></span></span></td>
			<td style="border-bottom:1px solid black; width:72px; padding:0in 7px 0in 7px; height:26px; border-top:none; border-right:1px solid black; border-left:none" valign="top"><span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">D</span></span></span></td>
			<td style="border-bottom:1px solid black; width:72px; padding:0in 7px 0in 7px; height:26px; border-top:none; border-right:1px solid black; border-left:none" valign="top"><span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">C</span></span></span></td>
			<td style="border-bottom:1px solid black; width:72px; padding:0in 7px 0in 7px; height:26px; border-top:none; border-right:1px solid black; border-left:none" valign="top"><span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">D</span></span></span></td>
		</tr>
	</tbody>
</table>
<br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><i><span style="font-size:14.0pt">II. Tự luận (8 điểm): </span></i></b></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><i><span style="font-size:14.0pt">Câu 9(2 điểm).</span></i></b></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">a) Kết quả x = <span style="position:relative"><span style="top:12.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image165.gif" style="width:24px; height:41px" /></span></span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(0,5 đ)</span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">b) Kết quả x <span style="position:relative"><span style="top:14.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image167.gif" style="width:69px; height:45px" /></span></span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(0,5 đ)</span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">c) Đk:&nbsp; x <span style="position:relative"><span style="top:2.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image169.gif" style="width:33px; height:17px" /></span></span>&nbsp;;&nbsp; &nbsp;x<span style="position:relative"><span style="top:3.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image171.gif" style="width:25px; height:19px" /></span></span>.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(0,25 đ)</span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">KL phương trình có nghiệm là x = 0.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(0,75 đ)</span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><i><span style="font-size:14.0pt">Câu 10( 2,5 điểm).</span></i></b></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">&nbsp; Gọi quãng đường AB dài x (km)&nbsp;&nbsp; ,&nbsp; (đk x &gt; 6)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (0,25 đ)</span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Thì quãng đường BC dài x – 6 (km) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(0,25 đ)</span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Thời gian đi quãng đường AB là <span style="position:relative"><span style="top:12.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image173.gif" style="width:24px; height:41px" /></span></span>(h)&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(0,25 đ)</span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Thời gian đi quãng đường BC là <span style="position:relative"><span style="top:12.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image175.gif" style="width:37px; height:41px" /></span></span>(h)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (0,25 đ)</span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Thời gian đi quãng đường AC là <span style="position:relative"><span style="top:12.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image177.gif" style="width:45px; height:41px" /></span></span>(h) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(0,25 đ)</span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Theo bài ra ta có phương trình: <span style="position:relative"><span style="top:12.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image173.gif" style="width:24px; height:41px" /></span></span>+ <span style="position:relative"><span style="top:12.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image175.gif" style="width:37px; height:41px" /></span></span>&nbsp;= <span style="position:relative"><span style="top:12.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image177.gif" style="width:45px; height:41px" /></span></span>&nbsp;<span style="position:relative"><span style="top:3.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image179.gif" style="width:23px; height:16px" /></span></span>x = 30 (TMĐK).&nbsp;&nbsp;&nbsp;&nbsp; (1 đ)</span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Kết luận quãng đường AB dài 30km, quãng đường BC dài 24km.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (0,25 đ)</span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><i><span style="font-size:14.0pt">Câu 11( 3 điểm).</span></i></b></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">&nbsp;&nbsp;&nbsp; a) Tính được diện tích <span style="position:relative"><span style="top:2.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image157.gif" style="width:15px; height:17px" /></span></span>ABC = 6cm<sup>2</sup> .&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (0,5 đ)</span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">&nbsp;&nbsp;&nbsp; b) Tính được BC = 5cm.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(0,5 đ)</span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">&nbsp;&nbsp;&nbsp; Vì HE//AC (gt). Áp dụng định lý Ta lét, ta có: <span style="position:relative"><span style="top:12.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image181.gif" style="width:161px; height:41px" /></span></span>&nbsp;&nbsp;(1)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (0,5 đ)</span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">&nbsp;&nbsp; Mà trong <span style="position:relative"><span style="top:2.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image157.gif" style="width:15px; height:17px" /></span></span>ABC có AH là tia phân giác của <span style="position:relative"><span style="top:2.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image095.gif" style="width:16px; height:23px" /></span></span>&nbsp;nên: <span style="position:relative"><span style="top:12.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image184.gif" style="width:187px; height:41px" /></span></span>&nbsp;(2) </span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">(0,5 đ)</span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Thay (2) vào (1) ta tính được BE = <span style="position:relative"><span style="top:12.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image186.gif" style="width:21px; height:41px" /></span></span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(0,25 đ)</span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">&nbsp;Vì <span style="position:relative"><span style="top:3.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image188.gif" style="width:73px; height:24px" /></span></span>&nbsp;(gt) và HE//AC (gt) <span style="position:relative"><span style="top:5.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image190.gif" style="width:95px; height:27px" /></span></span>.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (0,5 đ)</span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">Áp dụng định lý Pytago tính được EH = <span style="position:relative"><span style="top:12.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image192.gif" style="width:21px; height:41px" /></span></span>.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (0,25 đ)</span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><i><span style="font-size:14.0pt">Câu 12( 0,5 điểm).</span></i></b></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <span style="position:relative"><span style="top:12.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image163.gif" style="width:173px; height:41px" /></span></span></span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <span style="position:relative"><span style="top:12.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image194.gif" style="width:233px; height:41px" /></span></span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(0,25 đ)</span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <span style="position:relative"><span style="top:12.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image196.gif" style="width:199px; height:41px" /></span></span>&nbsp;&nbsp;<span style="position:relative"><span style="top:14.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image198.gif" style="width:200px; height:45px" /></span></span></span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <span style="position:relative"><span style="top:3.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image200.gif" style="width:73px; height:19px" /></span></span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(0,25 đ)</span></span></span><br />
<br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><span lang="FR" style="font-size:14.0pt"><span style="font-family:&#039;.VnTimeH&#039;,&#039;sans-serif&#039;">§</span></span></b><b><span lang="FR" style="font-size:14.0pt">Ề</span></b><b><span lang="FR" style="font-size:14.0pt"><span style="font-family:&#039;.VnTimeH&#039;,&#039;sans-serif&#039;"> thi </span></span></b><b><span lang="FR" style="font-size:14.0pt">KHẢO SÁT CHẤT LƯỢNG</span></b><b><span lang="FR" style="font-size:14.0pt"><span style="font-family:&#039;.VnTimeH&#039;,&#039;sans-serif&#039;"> ®ît 4</span></span></b></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span lang="FR" style="font-size:14.0pt">Năm học 2017 - 2018</span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><span style="font-size:16.0pt"><span style="font-family:&#039;.VnTimeH&#039;,&#039;sans-serif&#039;">M«n to¸n 9</span></span></b></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">Thêi gian lµm bµi 90 phót</span></span></span></span><br />
<br />
<span style="font-size:12pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><i><span style="font-size:14.0pt"><span style="line-height:115%">Câu 1(2,5 điểm).</span></span></i></b><span style="font-size:14.0pt"><span style="line-height:115%"> Cho hai hàm số (P): </span></span><span style="font-size:14.0pt"><span style="line-height:115%"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;"><span style="position:relative"><span style="top:5.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image202.gif" style="width:44px; height:24px" /></span></span>&nbsp;</span></span></span><span style="font-size:14.0pt"><span style="line-height:115%">và (d): </span></span><span style="font-size:14.0pt"><span style="line-height:115%"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;"><span style="position:relative"><span style="top:5.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image204.gif" style="width:65px; height:21px" /></span></span></span></span></span></span></span></span><br />
<span style="font-size:12pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="line-height:115%">&nbsp;&nbsp;&nbsp;&nbsp; a) Vẽ đồ thị (P) và (d) của hai hàm số trên cùng một hệ trục tọa độ.</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="line-height:115%">&nbsp;&nbsp;&nbsp;&nbsp; b) Tìm tọa độ giao điểm của (P) và (d) ( nếu có).</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><i><span style="font-size:14.0pt"><span style="line-height:115%">Câu 2(2 điểm).</span></span></i></b><span style="font-size:14.0pt"><span style="line-height:115%"> Cho phương trình&nbsp; </span></span><span style="font-size:14.0pt"><span style="line-height:115%"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;"><span style="position:relative"><span style="top:5.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image206.gif" style="width:217px; height:24px" /></span></span>&nbsp;(</span></span></span><span style="font-size:14.0pt"><span style="line-height:115%">m là tham số).&nbsp; (1)</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="line-height:115%">&nbsp;&nbsp;&nbsp;&nbsp; a) Tìm giá trị của m để phương trình (1) có hai nghiệm phân biệt.</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="line-height:115%"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="line-height:115%">b) Giải phương trình với m = 5.</span></span></span></span></span><br />
<span style="font-size:12pt"><span style="line-height:115%"><span style="tab-stops:39.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><i><span style="font-size:14.0pt"><span style="line-height:115%">Câu 3(1,5 điểm).</span></span></i></b><span style="font-size:14.0pt"><span style="line-height:115%"> <i>Giải bài toán sau bằng cách lập hệ phương trình:</i></span></span></span></span></span></span><br />
<span style="font-size:12pt"><span style="line-height:115%"><span style="tab-stops:39.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="line-height:115%">&nbsp;&nbsp;&nbsp; Hai tổ sản xuất cùng may một loại áo. Nếu tổ thứ nhất may trong 3 ngày, tổ thứ hai may trong 5 ngày thì cả hai tổ may được 1310 chiếc áo. Biết rằng trong một ngày, tổ thứ nhất may được nhiều hơn tổ thứ hai là 10 chiếc áo. Hỏi mỗi tổ trong một ngày may được bao nhiêu chiếc áo?</span></span></span></span></span></span><br />
<span style="font-size:12pt"><span style="line-height:115%"><span style="tab-stops:39.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><i><span style="font-size:14.0pt"><span style="line-height:115%">Câu 4(3,5 điểm).</span></span></i></b></span></span></span></span><br />
<span style="font-size:12pt"><span style="line-height:115%"><span style="tab-stops:39.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="line-height:115%">&nbsp;&nbsp;&nbsp;&nbsp; Cho <span style="position:relative"><span style="top:2.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image157.gif" style="width:15px; height:17px" /></span></span>ABC (AB &lt; AC) có ba góc nhọn nội tiếp trong đường tròn tâm O, bán kính R. Gọi H là giao điểm của ba đường cao AD, BE, CF của <span style="position:relative"><span style="top:2.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image157.gif" style="width:15px; height:17px" /></span></span>ABC.</span></span></span></span></span></span><br />
<span style="font-size:12pt"><span style="line-height:115%"><span style="tab-stops:39.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="line-height:115%">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; a) Chứng minh rằng AEHF và AEDB là các tứ giác nội tiếp đường tròn.</span></span></span></span></span></span><br />
<span style="font-size:12pt"><span style="line-height:115%"><span style="tab-stops:39.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="line-height:115%">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; b) Vẽ đường kính AK của đường tròn (O). Chứng minh<span style="position:relative"><span style="top:2.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image157.gif" style="width:15px; height:17px" /></span></span>ABD và <span style="position:relative"><span style="top:2.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image157.gif" style="width:15px; height:17px" /></span></span>AKC đồng dạng với nhau. Suy ra AB.AC = 2R.AD.</span></span></span></span></span></span><br />
<span style="font-size:12pt"><span style="line-height:115%"><span style="tab-stops:39.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="line-height:115%">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; c) Chứng minh rằng OC vuông góc với DE.</span></span></span></span></span></span><br />
<span style="font-size:12pt"><span style="line-height:115%"><span style="tab-stops:39.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><i><span style="font-size:14.0pt"><span style="line-height:115%">Câu 5</span></span></i></b><b><i><span lang="PT-BR" style="font-size:14.0pt"><span style="line-height:115%">(0,5 đ ).</span></span></i></b><span lang="PT-BR" style="font-size:14.0pt"><span style="line-height:115%"> Giải phương trình: </span></span><span style="font-size:14.0pt"><span style="line-height:115%"><span style="position:relative"><span style="top:5.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image208.gif" style="width:116px; height:31px" /></span></span></span></span><span lang="FR" style="font-size:14.0pt"><span style="line-height:115%">&nbsp;= x + 1 </span></span></span></span></span></span><br />
<span style="font-size:12pt"><span style="line-height:115%"><span style="tab-stops:39.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <span style="font-size:14.0pt"><span style="line-height:115%"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">--------------------------------------------------------------</span></span></span></span></span></span></span><br />
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<div style="page-break-after: always"><span style="display: none;">&nbsp;</span></div>
<br />
<span style="font-size:12pt"><span style="line-height:115%"><span style="tab-stops:39.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><i><span style="font-size:16.0pt"><span style="line-height:115%">Hướng dẫn chấm Toán 9</span></span></i></b></span></span></span></span><br />
<span style="font-size:12pt"><span style="tab-stops:39.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><i><span style="font-size:14.0pt">Câu 1(2,0 điểm)&nbsp;&nbsp; </span></i></b></span></span></span><br />
<span style="font-size:12pt"><span style="tab-stops:39.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">a) Lập bảng giá trị (</span><span style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;"><span style="position:relative"><span style="top:5.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image202.gif" style="width:44px; height:24px" /></span></span>)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span></span><span style="font-size:14.0pt">0,25 đ</span></span></span></span><br />
&nbsp;
<table class="Table" style="margin-left:26px; border-collapse:collapse; border:none">
	<tbody>
		<tr>
			<td style="border-bottom:1px solid black; width:86px; padding:0in 7px 0in 7px; border-top:1px solid black; border-right:1px solid black; border-left:1px solid black" valign="top"><span style="font-size:12pt"><span style="tab-stops:39.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">x</span></span></span></span></td>
			<td style="border-bottom:1px solid black; width:112px; padding:0in 7px 0in 7px; border-top:1px solid black; border-right:1px solid black; border-left:none" valign="top"><span style="font-size:12pt"><span style="tab-stops:39.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">-2</span></span></span></span></td>
			<td style="border-bottom:1px solid black; width:112px; padding:0in 7px 0in 7px; border-top:1px solid black; border-right:1px solid black; border-left:none" valign="top"><span style="font-size:12pt"><span style="tab-stops:39.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">-1</span></span></span></span></td>
			<td style="border-bottom:1px solid black; width:112px; padding:0in 7px 0in 7px; border-top:1px solid black; border-right:1px solid black; border-left:none" valign="top"><span style="font-size:12pt"><span style="tab-stops:39.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">0</span></span></span></span></td>
			<td style="border-bottom:1px solid black; width:112px; padding:0in 7px 0in 7px; border-top:1px solid black; border-right:1px solid black; border-left:none" valign="top"><span style="font-size:12pt"><span style="tab-stops:39.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">1</span></span></span></span></td>
			<td style="border-bottom:1px solid black; width:90px; padding:0in 7px 0in 7px; border-top:1px solid black; border-right:1px solid black; border-left:none" valign="top"><span style="font-size:12pt"><span style="tab-stops:39.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">2</span></span></span></span></td>
		</tr>
		<tr>
			<td style="border-bottom:1px solid black; width:86px; padding:0in 7px 0in 7px; border-top:none; border-right:1px solid black; border-left:1px solid black" valign="top"><span style="font-size:12pt"><span style="tab-stops:39.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;"><span style="position:relative"><span style="top:5.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image202.gif" style="width:44px; height:24px" /></span></span></span></span></span></span></span></td>
			<td style="border-bottom:1px solid black; width:112px; padding:0in 7px 0in 7px; border-top:none; border-right:1px solid black; border-left:none" valign="top"><span style="font-size:12pt"><span style="tab-stops:39.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">4</span></span></span></span></td>
			<td style="border-bottom:1px solid black; width:112px; padding:0in 7px 0in 7px; border-top:none; border-right:1px solid black; border-left:none" valign="top"><span style="font-size:12pt"><span style="tab-stops:39.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">1</span></span></span></span></td>
			<td style="border-bottom:1px solid black; width:112px; padding:0in 7px 0in 7px; border-top:none; border-right:1px solid black; border-left:none" valign="top"><span style="font-size:12pt"><span style="tab-stops:39.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">0</span></span></span></span></td>
			<td style="border-bottom:1px solid black; width:112px; padding:0in 7px 0in 7px; border-top:none; border-right:1px solid black; border-left:none" valign="top"><span style="font-size:12pt"><span style="tab-stops:39.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">1</span></span></span></span></td>
			<td style="border-bottom:1px solid black; width:90px; padding:0in 7px 0in 7px; border-top:none; border-right:1px solid black; border-left:none" valign="top"><span style="font-size:12pt"><span style="tab-stops:39.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">4</span></span></span></span></td>
		</tr>
	</tbody>
</table>
<span style="font-size:12pt"><span style="tab-stops:39.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">&nbsp;&nbsp;&nbsp; Trên mặt phẳng tọa độ lấy các điểm A (-2;4), B(-1;1), O (0;0), </span><span style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;"><span style="position:relative"><span style="top:5.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image210.gif" style="width:99px; height:24px" /></span></span>.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span></span></span></span><br />
<span style="font-size:12pt"><span style="tab-stops:39.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">&nbsp;&nbsp;&nbsp;&nbsp; Đồ thị hàm số (P) là một đường cong đi qua các điểm </span><span style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;"><span style="position:relative"><span style="top:5.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image212.gif" style="width:88px; height:24px" /></span></span>&nbsp;</span></span><span style="font-size:14.0pt">nhận O làm đỉnh và trục oy làm trục đối xứng.&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;0,25 đ</span></span></span></span><br />
<span style="font-size:12pt"><span style="tab-stops:39.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">&nbsp;&nbsp;&nbsp;&nbsp; Lập bảng giá trị (</span><span style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;"><span style="position:relative"><span style="top:5.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image204.gif" style="width:65px; height:21px" /></span></span>)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;</span></span><span style="font-size:14.0pt">0,25 đ</span></span></span></span><br />
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			<td style="border-bottom:1px solid black; width:189px; padding:0in 7px 0in 7px; border-top:1px solid black; border-right:1px solid black; border-left:1px solid black" valign="top"><span style="font-size:12pt"><span style="tab-stops:39.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">X</span></span></span></span></td>
			<td style="border-bottom:1px solid black; width:225px; padding:0in 7px 0in 7px; border-top:1px solid black; border-right:1px solid black; border-left:none" valign="top"><span style="font-size:12pt"><span style="tab-stops:39.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">0</span></span></span></span></td>
			<td style="border-bottom:1px solid black; width:183px; padding:0in 7px 0in 7px; border-top:1px solid black; border-right:1px solid black; border-left:none" valign="top"><span style="font-size:12pt"><span style="tab-stops:39.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">1</span></span></span></span></td>
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			<td style="border-bottom:1px solid black; width:189px; padding:0in 7px 0in 7px; border-top:none; border-right:1px solid black; border-left:1px solid black" valign="top"><span style="font-size:12pt"><span style="tab-stops:39.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;"><span style="position:relative"><span style="top:5.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image204.gif" style="width:65px; height:21px" /></span></span></span></span></span></span></span></td>
			<td style="border-bottom:1px solid black; width:225px; padding:0in 7px 0in 7px; border-top:none; border-right:1px solid black; border-left:none" valign="top"><span style="font-size:12pt"><span style="tab-stops:39.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">-1</span></span></span></span></td>
			<td style="border-bottom:1px solid black; width:183px; padding:0in 7px 0in 7px; border-top:none; border-right:1px solid black; border-left:none" valign="top"><span style="font-size:12pt"><span style="tab-stops:39.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">1</span></span></span></span></td>
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<span style="font-size:12pt"><span style="tab-stops:39.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">&nbsp;&nbsp;&nbsp; Đồ thị hàm số là đường thẳng (d) đi qua hai điểm (0; - 1) , (1; 1)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0,25 đ&nbsp;&nbsp;&nbsp; </span></span></span></span><br />
<span style="font-size:12pt"><span style="tab-stops:39.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">&nbsp;&nbsp;&nbsp; Vẽ đồ thị.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0,5đ</span></span></span></span><br />
<span style="font-size:12pt"><span style="tab-stops:39.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">&nbsp;&nbsp; b) Phương trình hoành độ giao điểm của (P) và (d) thỏa mãn phương trình: </span></span></span></span><br />
<span style="font-size:12pt"><span style="tab-stops:39.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">&nbsp; <span style="position:relative"><span style="top:5.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image214.gif" style="width:331px; height:24px" /></span></span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span></span><span style="font-size:14.0pt">0,25 đ</span></span></span></span><br />
<span style="font-size:12pt"><span style="tab-stops:39.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">Vậy tọa độ giao điểm (P) và (d) là M(1; 1)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;0,25 đ</span></span></span></span><br />
<span style="font-size:12pt"><span style="tab-stops:39.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><i><span style="font-size:14.0pt">Câu 2(2 điểm)</span></i></b></span></span></span><br />
<span style="font-size:12pt"><span style="tab-stops:39.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">a) Điều kiện để phương trình (1) là phương trình bậc hai: </span><span style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;"><span style="position:relative"><span style="top:3.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image216.gif" style="width:117px; height:19px" /></span></span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;0,2</span></span><span style="font-size:14.0pt">5 đ</span></span></span></span><br />
<span style="font-size:12pt"><span style="tab-stops:39.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">ta có:&nbsp;&nbsp; </span><span style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;"><span style="position:relative"><span style="top:14.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image218.gif" style="width:415px; height:45px" /></span></span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span></span><span style="font-size:14.0pt">0,25 </span></span></span></span><br />
<span style="font-size:12pt"><span style="tab-stops:39.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">&nbsp;&nbsp;&nbsp;&nbsp; Để phương trình có hai nghiệm phân biệt thì </span><span style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;"><span style="position:relative"><span style="top:12.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image220.gif" style="width:191px; height:41px" /></span></span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span></span><span style="font-size:14.0pt">0,25 đ</span></span></span></span><br />
<span style="font-size:12pt"><span style="tab-stops:39.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">&nbsp;&nbsp;&nbsp;&nbsp; Kết hợp điều kiện. Vậy <span style="position:relative"><span style="top:12.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image222.gif" style="width:81px; height:41px" /></span></span>&nbsp;thì pt (1) có 2 nghiệm phân biệt.&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;0,25 đ</span></span></span></span><br />
<span style="font-size:12pt"><span style="tab-stops:39.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">b) Với m = 5 ta có phương trình: </span><span style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;"><span style="position:relative"><span style="top:15.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image224.gif" style="width:115px; height:48px" /></span></span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span></span><span style="font-size:14.0pt">0,5 đ</span></span></span></span><br />
<span style="font-size:12pt"><span style="tab-stops:39.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">Do <span style="position:relative"><span style="top:3.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image226.gif" style="width:43px; height:21px" /></span></span>&nbsp;phương trình có hai nghiệm phân biệt:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span style="position:relative"><span style="top:12.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image228.gif" style="width:296px; height:45px" /></span></span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;0,5 đ</span></span></span></span><br />
<span style="font-size:12pt"><span style="tab-stops:39.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><i><span lang="VI" style="font-size:14.0pt">Câu 3(1,5 điểm)&nbsp;&nbsp; </span></i></b></span></span></span><br />
<span style="font-size:12pt"><span style="tab-stops:39.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span lang="VI" style="font-size:14.0pt">&nbsp;&nbsp;&nbsp;&nbsp; Gọi <i>x</i>, <i>y</i> (chiếc) lần lượt là số áo của tổ thứ nhất và tổ thứ hai mỗi ngày may được. </span><span lang="FR" style="font-size:14.0pt">ĐK: </span><i><span lang="VI" style="font-size:14.0pt">x</span></i><span lang="FR" style="font-size:14.0pt">, </span><i><span lang="VI" style="font-size:14.0pt">y</span></i><span lang="FR" style="font-size:14.0pt"> nguyên dương .&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0,25đ</span></span></span></span><br />
<span style="font-size:12pt"><span style="tab-stops:39.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span lang="FR" style="font-size:14.0pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Theo đề bài, ta có hệ phương trình: </span><span style="font-size:14.0pt"><span style="position:relative"><span style="top:15.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image230.gif" style="width:107px; height:48px" /></span></span></span><span lang="FR" style="font-size:14.0pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;0,5 đ</span></span></span></span><br />
<span style="font-size:12pt"><span style="tab-stops:39.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span lang="FR" style="font-size:14.0pt">&nbsp;&nbsp;&nbsp;&nbsp; Giải hệ phương trình trên tìm được: </span><span style="font-size:14.0pt"><span style="position:relative"><span style="top:15.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image232.gif" style="width:61px; height:48px" /></span></span></span><span lang="FR" style="font-size:14.0pt">&nbsp;(thỏa mãn đk)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;0,5 đ</span></span></span></span><br />
<span style="font-size:12pt"><span style="tab-stops:39.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span lang="FR" style="font-size:14.0pt">&nbsp;&nbsp;&nbsp;&nbsp; Vậy trong một ngày, tổ thứ nhất may được 170 chiếc áo, tổ thứ hai may được 160 chiếc áo.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;0,25 đ</span></span></span></span><br />
<span style="font-size:12pt"><span style="tab-stops:39.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><i><span lang="FR" style="font-size:14.0pt">Câu 4(3,5 điểm)</span></i></b></span></span></span><br />
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			<td style="width:147px; padding:0in 7px 0in 7px" valign="top">&nbsp;</td>
			<td style="width:340px; padding:0in 7px 0in 7px" valign="top"><span style="font-size:12pt"><span style="tab-stops:39.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><span style="font-size:14.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image234.gif" style="width:326px; height:324px" /></span></b></span></span></span></td>
			<td style="width:84px; padding:0in 7px 0in 7px" valign="top"><br />
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			<span style="font-size:12pt"><span style="tab-stops:39.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span lang="FR" style="font-size:14.0pt">0,25 đ</span></span></span></span></td>
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<span style="font-size:12pt"><span style="tab-stops:39.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><i><span lang="FR" style="font-size:14.0pt">a)(1,25 điểm)</span></i></span></span></span><br />
<span style="font-size:12pt"><span style="tab-stops:39.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <span lang="PT-BR" style="font-size:14.0pt">Ta có &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><span style="font-size:14.0pt"><span style="position:relative"><span style="top:3.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image236.gif" style="width:79px; height:24px" /></span></span></span><span lang="PT-BR" style="font-size:14.0pt">&nbsp;và </span><span style="font-size:14.0pt"><span style="position:relative"><span style="top:3.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image238.gif" style="width:77px; height:24px" /></span></span></span><span lang="PT-BR" style="font-size:14.0pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;0,25 đ</span></span></span></span><br />
<span style="font-size:12pt"><span style="tab-stops:39.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span lang="PT-BR" style="font-size:14.0pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Do đó&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><span style="font-size:14.0pt"><span style="position:relative"><span style="top:2.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image240.gif" style="width:40px; height:23px" /></span></span></span><span lang="PT-BR" style="font-size:14.0pt">&nbsp;+ </span><span style="font-size:14.0pt"><span style="position:relative"><span style="top:3.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image242.gif" style="width:84px; height:24px" /></span></span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span></span></span><br />
<span style="font-size:12pt"><span style="tab-stops:39.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <span lang="PT-BR" style="font-size:14.0pt"><span style="font-family:Symbol">Þ</span></span><span lang="PT-BR" style="font-size:14.0pt"> Tứ giác AEHF nội tiếp được.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0,25 đ</span></span></span></span><br />
<span style="font-size:12pt"><span style="tab-stops:39.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span lang="PT-BR" style="font-size:14.0pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Ta lại có, </span><span style="font-size:14.0pt"><span style="position:relative"><span style="top:3.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image244.gif" style="width:128px; height:24px" /></span></span></span><span lang="PT-BR" style="font-size:14.0pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;0,5 đ</span></span></span></span><br />
<span style="font-size:12pt"><span style="tab-stops:39.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <span lang="PT-BR" style="font-size:14.0pt"><span style="font-family:Symbol">Þ</span></span><span lang="PT-BR" style="font-size:14.0pt"> E và D cùng nhìn cạnh AB dưới một góc vuông&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span></span></span><br />
<span style="font-size:12pt"><span style="tab-stops:39.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span lang="PT-BR" style="font-size:14.0pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Vậy tứ giác AEDB nội tiếp được.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;0,25 đ&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span></span></span><br />
<span style="font-size:12pt"><span style="tab-stops:39.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span lang="PT-BR" style="font-size:14.0pt">b)<i>( 1 điểm )</i> Ta có </span><span style="font-size:14.0pt"><span style="position:relative"><span style="top:3.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image246.gif" style="width:80px; height:24px" /></span></span></span><span lang="PT-BR" style="font-size:14.0pt">&nbsp;(góc nội tiếp chắn nửa đường tròn)&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;0,25 đ</span></span></span></span><br />
<span style="font-size:12pt"><span style="tab-stops:39.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <span style="font-size:14.0pt">Hai tam giác vuông ADB và ACK, có:</span></span></span></span><br />
<span style="font-size:12pt"><span style="tab-stops:39.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;<span style="position:relative"><span style="top:3.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image248.gif" style="width:93px; height:24px" /></span></span>&nbsp;(góc nội tiếp cùng chắn cung AC)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0,25 đ</span></span></span></span><br />
<span style="font-size:12pt"><span style="tab-stops:39.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Suy ra </span><span style="font-size:14.0pt"><span style="font-family:Symbol">D</span></span><span style="font-size:14.0pt">ABD </span><span style="font-size:14.0pt"><span style="font-family:&#039;MS Song&#039;">∽</span></span><span style="font-size:14.0pt"><span style="font-family:Symbol">D</span></span><span style="font-size:14.0pt">AKC (g-g)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0,25 đ</span></span></span></span><br />
<span style="font-size:12pt"><span style="tab-stops:39.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Từ đó ta được: <span style="position:relative"><span style="top:12.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image250.gif" style="width:77px; height:41px" /></span></span></span></span></span></span><br />
&nbsp;
<ul>
	<li style="list-style-type:none">
	<ul>
		<li style="margin-top:4px; margin-bottom:4px; margin-left:68px; text-align:justify"><span style="font-size:12pt"><span style="tab-stops:39.0pt list 111.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">AB.AC = AK.AD</span></span></span></span></li>
		<li style="margin-top:4px; margin-bottom:4px; margin-left:68px; text-align:justify"><span style="font-size:12pt"><span style="tab-stops:39.0pt list 111.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">AB.AC = 2R.AD&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0,25 đ</span></span></span></span></li>
	</ul>
	</li>
</ul>
<span style="font-size:12pt"><span style="tab-stops:39.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><i><span style="font-size:14.0pt">c)(1,0 điểm)</span></i></span></span></span><br />
<span style="font-size:12pt"><span style="tab-stops:39.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Vẽ tiếp tuyến xy tại C của (O)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span></span></span><br />
<span style="font-size:12pt"><span style="tab-stops:39.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Ta có OC </span><span style="font-size:14.0pt"><span style="font-family:Symbol">^</span></span><span style="font-size:14.0pt"> Cx&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (1)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0,25 đ</span></span></span></span><br />
<span style="font-size:12pt"><span style="tab-stops:39.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Mặt khác, AEDB nội tiếp</span></span></span></span><br />
<span style="font-size:12pt"><span style="tab-stops:39.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <span style="font-size:14.0pt"><span style="font-family:Symbol">Þ</span></span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <span style="font-size:14.0pt"><span style="position:relative"><span style="top:3.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image252.gif" style="width:91px; height:24px" /></span></span></span><span lang="ES-VE" style="font-size:14.0pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0,25 đ</span></span></span></span><br />
<span style="font-size:12pt"><span style="tab-stops:39.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span lang="ES-VE" style="font-size:14.0pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Mà &nbsp;&nbsp; </span><span style="font-size:14.0pt"><span style="position:relative"><span style="top:3.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image254.gif" style="width:89px; height:24px" /></span></span></span>&nbsp;</span></span></span><br />
<span style="font-size:12pt"><span style="tab-stops:39.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span lang="ES-VE" style="font-size:14.0pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Nên&nbsp;&nbsp; </span><span style="font-size:14.0pt"><span style="position:relative"><span style="top:3.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image256.gif" style="width:89px; height:24px" /></span></span></span><span lang="ES-VE" style="font-size:14.0pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0,25 đ</span></span></span></span><br />
<span style="font-size:12pt"><span style="tab-stops:39.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span lang="ES-VE" style="font-size:14.0pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Do đó&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Cx // DE&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (2)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <span lang="FR" style="font-size:14.0pt">Từ&nbsp; (1) và (2) ta có: OC </span><span style="font-size:14.0pt"><span style="font-family:Symbol">^</span></span><span lang="FR" style="font-size:14.0pt"> DE.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;0,25 đ</span></span></span><br />
<span style="font-size:12pt"><span style="tab-stops:39.0pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><i><span lang="FR" style="font-size:14.0pt">&nbsp;&nbsp;&nbsp; Câu 5(0,5 điểm).</span></i></b></span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;</span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span lang="FR" style="font-size:14.0pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;Giải phương trình : </span><span style="font-size:14.0pt"><span style="position:relative"><span style="top:5.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image208.gif" style="width:116px; height:31px" /></span></span></span><span lang="FR" style="font-size:14.0pt">&nbsp;= x + 1 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (1)</span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span lang="FR" style="font-size:14.0pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Điều kiện: 1 + x </span><span style="font-size:14.0pt"><span style="position:relative"><span style="top:3.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image258.gif" style="width:65px; height:27px" /></span></span></span><span style="font-size:14.0pt">&nbsp;<u>&gt;</u> 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;0,25 đ</span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <span style="font-size:14.0pt">(1) &nbsp;&nbsp;&nbsp; <span style="position:relative"><span style="top:3.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image260.gif" style="width:25px; height:17px" /></span></span>&nbsp;1 + x <span style="position:relative"><span style="top:3.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image258.gif" style="width:65px; height:27px" /></span></span>&nbsp;= x<sup>2</sup> + 2x&nbsp; + 1</span></span></span><br />
<span style="font-size:12pt"><span style="tab-stops:.5in 1.0in 1.5in 2.0in 2.5in center 247.8pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <span style="position:relative"><span style="top:3.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image260.gif" style="width:25px; height:17px" /></span></span>&nbsp;x <span style="position:relative"><span style="top:3.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image258.gif" style="width:65px; height:27px" /></span></span>&nbsp;= x (x+2)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <span style="position:relative"><span style="top:3.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image260.gif" style="width:25px; height:17px" /></span></span>&nbsp;x &#91;<span style="position:relative"><span style="top:3.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image258.gif" style="width:65px; height:27px" /></span></span>&nbsp;- ( x + 2 )&#93; =&nbsp; 0</span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <span style="position:relative"><span style="top:3.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image260.gif" style="width:25px; height:17px" /></span></span>&nbsp;<span style="position:relative"><span style="top:18.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image263.gif" style="width:225px; height:56px" /></span></span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;0,25 đ</span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; PT (*)&nbsp; <span style="position:relative"><span style="top:3.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image260.gif" style="width:25px; height:17px" /></span></span>&nbsp; x<sup>2</sup> + 4 = x<sup>2</sup> + 4x +4&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;0,25 đ</span></span></span><br />
<span style="font-size:12pt"><span style="tab-stops:.5in 1.0in 1.5in 2.0in 3.0in"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <span style="position:relative"><span style="top:3.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image260.gif" style="width:25px; height:17px" /></span></span>&nbsp;4x = 0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <span style="position:relative"><span style="top:3.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image260.gif" style="width:25px; height:17px" /></span></span>&nbsp;x = 0</span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">&nbsp;&nbsp;&nbsp;&nbsp; Dễ thấy x = 0 thì 1 + x <span style="position:relative"><span style="top:3.0pt"><img alt="" src="https://thcsthanhthuy.xatamhung.edu.vn/file:///C:\Users\ADMINI~1\AppData\Local\Temp\msohtmlclip1\01\clip_image258.gif" style="width:65px; height:27px" /></span></span>&nbsp;= 1 &gt; 0 thỏa mãn điều kiện</span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt">&nbsp;&nbsp;&nbsp;&nbsp; Nên phương trình có nghiệm x = 0.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;0,25 đ</span></span></span><br />
<span style="font-size:12pt"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <span lang="FR" style="font-size:14.0pt"><span style="font-family:&#039;.VnTime&#039;,&#039;sans-serif&#039;">-------------------------------------------------------------</span></span></span></span><br />
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