ĐỀ THI KHẢO SÁT CHẤT LƯỢNG - TOÁN LỚP 9
- Thứ bảy - 31/07/2021 07:27
- In ra
- Đóng cửa sổ này
ĐỀ THI KHẢO SÁT CHẤT LƯỢNG
M«n to¸n 9
Thêi gian lµm bµi 60 phót(Không kể thời gian phát đề)
Họ và tên:………………………..
Lớp ……
Bài làm
Câu 1(1,5 điểm). Giải phương trình và hệ phương trình sau:
a)
; b) x2 - 5x + 6 = 0
...............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
.........................................................................................................................................
Câu 2(2,5 điểm).
a)VÏ ®å thÞ hµm sè y = f (x) = 2 x2
b)TÝnh gi¸ trÞ f (- 2) ; f (- 3) ; f (1,5) ?
...............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
...........................................................................................................................................................................................................................................................................................................................................................................................................................
.........................................................................................................................................
.........................................................................................................................................
Câu 3(2,5 điểm).Trong th¸ng ®Çu hai tæ s¶n xuÊt ®ưîc 500 chi tiÕt m¸y. Sang th¸ng
thø hai tæ I vưît møc 10 %, tæ II Vưît møc 15 %, ®o ®ã cuèi th¸ng hai tæ s¶n xuÊt
®ưîc 560 chi tiÕt m¸y. TÝnh xem trong th¸ng ®Çu mçi tæ s¶n xuÊt ®ưîc bao nhiªu chi
tiÕt m¸y?
...............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
...........................................................................................................................................................................................................................................................................................................................................................................................................................
.........................................................................................................................................
...........................................................................................................................................................................................................................................................................................................................................................................................................................
..................................................................................................................................................................................................................................................................................Câu 4(4 điểm). Cho
ABC có ba góc nhọn (AB < AC) nội tiếp đường tròn (O). Các đường cao AF và CE của ABC cắt nhau tại H (F
BC; EAB).
a) Chứng minh tứ giác AEFC nội tiếp được đường tròn
b) Kẻ đường kính AK của đường tròn (O). Chứng minh: AB.AC = AK.AF
c) Kẻ FM // BK (MAK). Chứng minh: CM vuông góc với AK.
...............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
...........................................................................................................................................................................................................................................................................................................................................................................................................................
.........................................................................................................................................
...............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
...........................................................................................................................................................................................................................................................................................................................................................................................................................
.........................................................................................................................................
...............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
...........................................................................................................................................................................................................................................................................................................................................................................................................................
.........................................................................................................................................
M«n to¸n 9
Thêi gian lµm bµi 60 phót(Không kể thời gian phát đề)
Họ và tên:………………………..
|
Bài làm
Câu 1(1,5 điểm). Giải phương trình và hệ phương trình sau:
a)
; b) x2 - 5x + 6 = 0...............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
.........................................................................................................................................
Câu 2(2,5 điểm).
a)VÏ ®å thÞ hµm sè y = f (x) = 2 x2
b)TÝnh gi¸ trÞ f (- 2) ; f (- 3) ; f (1,5) ?
...............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
...........................................................................................................................................................................................................................................................................................................................................................................................................................
.........................................................................................................................................
.........................................................................................................................................
Câu 3(2,5 điểm).Trong th¸ng ®Çu hai tæ s¶n xuÊt ®ưîc 500 chi tiÕt m¸y. Sang th¸ng
thø hai tæ I vưît møc 10 %, tæ II Vưît møc 15 %, ®o ®ã cuèi th¸ng hai tæ s¶n xuÊt
®ưîc 560 chi tiÕt m¸y. TÝnh xem trong th¸ng ®Çu mçi tæ s¶n xuÊt ®ưîc bao nhiªu chi
tiÕt m¸y?
...............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
...........................................................................................................................................................................................................................................................................................................................................................................................................................
.........................................................................................................................................
...........................................................................................................................................................................................................................................................................................................................................................................................................................
..................................................................................................................................................................................................................................................................................Câu 4(4 điểm). Cho
ABC có ba góc nhọn (AB < AC) nội tiếp đường tròn (O). Các đường cao AF và CE của ABC cắt nhau tại H (FBC; EAB).a) Chứng minh tứ giác AEFC nội tiếp được đường tròn
b) Kẻ đường kính AK của đường tròn (O). Chứng minh: AB.AC = AK.AF
c) Kẻ FM // BK (M
AK). Chứng minh: CM vuông góc với AK................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
...........................................................................................................................................................................................................................................................................................................................................................................................................................
.........................................................................................................................................
...............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
...........................................................................................................................................................................................................................................................................................................................................................................................................................
.........................................................................................................................................
...............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
...........................................................................................................................................................................................................................................................................................................................................................................................................................
.........................................................................................................................................