Đề kiểm tra 15 phút Toán Lớp 9 - Chương 1

Bµi kiÓm tra 15 phót M«n : To¸n 9 - Ch­¬ng I Thêi gian: .... phót Hä vµ tªn:Líp:9...... §iÓm Lêi phª cña thÇy c« gi¸o §Ò bµi: I.Tr¾c nghiÖm: C©u 1 (4®iÓm). §iÒn ®óng(§)- sai(S) vµo « trèng trong c¸c c©u sau ®©y: a, x¸c ®Þnh khi vµ chØ khi b, x¸c ®Þnh víi mäi x R c, d, II.Tù luËn: C©u 2 (3 ®iÓm). TÝnh: a, b, c, C©u 3 (3 ®iÓm). Rót gän: a, b, ( Víi x<2 ) Bµi lµm 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Tr­êng thcs Bµi kiÓm tra 1 tiÕt M«n : To¸n 9 - Ch­¬ng I Thêi gian: .... phót Hä vµ tªn:Líp:9...... §iÓm Lêi phª cña thÇy c« gi¸o §Ò bµi: I.Tr¾c nghiÖm: C©u 1 (2 ®). Khoanh trßn vµo ®¸p ¸n ®óng cho nh÷ng c©u sau: 1, CBHSH cña 49 lµ: A. 7; B. -7; C. 7. 2, §KX§ cña lµ: A. ; B. ; C.; D.. 3, Ph­¬ng tr×nh cã nghiÖm lµ: A. x=7; B. x=-7; C. ; D. . 4, Gi¸ trÞ biÓu thøc: lµ: A.; B.. II.Tù luËn: C©u 2(4®). TÝnh: 1, 2, ()() 3, 4, C©u3(3®). Cho biÓu thøc: 1, Rót gän biÓu thøc Q. 2, T×m gi¸ trÞ nhá nhÊt cña biÓu thøc Q. C©u 4(1®). Gi¶i ph­¬ng tr×nh: Bµi lµm 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Tr­êng thcs Bµi kiÓm tra 1 tiÕt M«n : To¸n 9 - Ch­¬ng II Thêi gian: .... phót Hä vµ tªn:Líp:9...... §iÓm Lêi phª cña thÇy c« gi¸o §Ò bµi: I.Tr¾c nghiÖm: Câu 1: Đường thẳng đi điểm A (1;3) song song với đường thẳng y = -3x +2 là: A. y = - 3x – 6 B. y = -3x C. y = -3x + 6 D. y = 3x + 6 Câu 2: Điểm thuộc đồ thị hám số y = 2x – 5 là: A. (-2; -1) B. ( 3; 2) C. ( 1; -3) D. ( -1; 7 ) Câu 3: Trong các hàm số sau hàm số nào không phải là hàm số bậc nhất A. y = 3x – 5 B. y = - 2x C. y = D. y = ( x – ) Câu 4: Cho hàm số y = kx + 3 và hàm số y = - 2 x – 1. Đồ thị của hai hàm số là hai đường thẳng song song khi k bằng: A. 2 B. 0 C. 1 D. – 2 Câu 5: Cho hàm số y = (2 – m) x + m – 1 là hàm số bậc nhất khi m khác: A. -1 B. 2 C. 0 D. 1 Câu 6: Đồ thị hàm số y = đi qua điểm có tọa độ là: A. ( 2 ; 0) B. (-1; ) C. ( -2 ; 1) D. ( -2 ; -1) Câu 7: Trong các hàm số sau hàm số nào đồng biến A. y = 5 – x B. y = ( 3 – x ) C. y = – x – 2 D. y = 3 – 2 ( x – 1 ) Câu 8: Hàm số y = 2x + m – 2 . Xác định giá trị của m để đồ thị hàm số đi qua điểm A (0; 4) là: A. m = 0 B. m = 2 C. m = 4 D. m = 6 II.Tù luËn: Câu 9: Cho hai hàm số: y = 2x + 2 (d1) và y = x – 3 (d2 ) Vẽ đồ thị của hai hàm số đã cho trên cùng một mặt phẳng tọa độ vuông góc Gọi giao điểm của đường thẳng (d1) và (d2 ) là A. Tìm tọa độ của điểm A Gọi B là điểm trên (d1) có hoành độ bằng – 2 và C là điểm trên (d2) có tung độ bằng – 2 . Tính diện tích OBC ( với O là gốc tọa độ ) Câu 10: Cho đường thẳng (d): y = (x + 1) và điểm A (1; ) Tính số đo góc tạo bởi đường thẳng (d) và trục Ox Gọi B là giao điểm của đường thẳng (d) với trục hoành . Viết phương trình đường thẳng đi qua A và B và số đo góc tạo bởi đường thẳng AB và trục Ox Bµi lµm 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Tr­êng thcs Bµi kiÓm tra 1 tiÕt M«n : To¸n 9 - Ch­¬ng III Thêi gian: .... phót Hä vµ tªn:Líp:9...... §iÓm Lêi phª cña thÇy c« gi¸o §Ò bµi: I.Tr¾c nghiÖm: C©u 1(4®). Chän ®¸p ¸n ®óng cho mçi c©u sau 1, Hµm sè ®ång biÕn khi vµ chØ khi: A. ; B. ; C. ; D . m > 2. E. m < 2 2, CÆp sè nµo sau ®©y lµ nghiÖm cña ph­¬ng tr×nh: 5x + 4y = 8 A. (0;2) , B. (2;0), C. (1;2), D. (2;1) 3, NghiÖm cña hÖ ph­¬ng tr×nh: lµ A. (-4;1), B. (-4;-1), C. (4;-1) , D. (4;1) 4, Sè nghiÖm cña hÖ ph­¬ng tr×nh: lµ: A. Cã mét nghiÖm duy nhÊt; B. Cã v« sè nghiÖm; C. V« nghiÖm; II.Tù luËn: C©u 2(2®). Gi¶i hÖ ph­¬ng tr×nh: a, b, C©u 3 (3®). Hai ng­êi lµm chung mét c«ng viÖc th× sau 16 giê xong c«ng viÖc. Ng­êi thø nhÊt lµm trong 3 giê, ng­êi thø hai lµm trong 6 giê th× ®­îc 25% c«ng viÖc. Hái mçi ng­êi lµm mét m×nh th× sau bao l©u xong c«ng viÖc? C©u 4 (1®). T×m tÊt c¶ c¸c gi¸ trÞ cña a ®Ó hÖ ph­¬ng tr×nh v« nghiÖm. 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