ĐỀ THI KHẢO SÁT CHẤT LƯỢNG - TOÁN LỚP 9

Thứ bảy - 31/07/2021 07:27

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:………………………..

Điểm

Lớp ……
                                                        Bài làm

Câu 1(1,5 điểm). Giải phương trình và hệ phương trình sau:
     a)

                              ;                              b) x²- 5x + 6 = 0
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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) ?
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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?
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..................................................................................................................................................................................................................................................................................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; E

AB).
     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.
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Nguồn tin: Giáo viên: Nguyễn Thị Liên