Kiểm tra 45 phút môn: Đại số 10 nâng cao chương 4

<span class='text_page_counter'>(1)</span>Hä vµ tªn: ........................................................Líp 10A1. §iÓm. KiÓm tra: 45’ M«n: §¹i sè 10. N©ng Cao. I. Tr¾c nghiÖm (2 ®iÓm) Câu 1. Bất phương trình 3x 2  4x  6  0 có tập nghiệm là:   2  22  2  22  A. T   ; C. T   ; ;  3 3      2  22 2  22   2  22 2  22  B. T   D. T   ; ;   3 3 3 3    . .  . . C©u 2 Tam thøc bËc hai: f x   1  2 x 2  3  2x  2 A. ¢m víi mäi x  A. . C. ¢m víi mäi x   2; 1  2. . B. Dương với mọi x  A . 1   D. ¢m víi mäi x    3;  3 . II. Tù luËn: (8 ®iÓm) C©u 1. (4 ®iÓm) Cho phương trình:  x 2  m  1x  m 2  5m  6  0 . a. Chứng minh rằng với mọi m phương trình đã cho luôn có 2 nghiệm phân biệt. b. Tìm giá trị của m để phương trình có 2 nghiệm trái dấu? C©u 2. (3 ®iÓm) Chøng minh r»ng: 2a 2  b 2  c 2  2a b  c , a,b,c  A C©u 3. (1 ®iÓm) 1 1 Tìm tập xác định của hàm số: y   2 2 x  7x  5 x  2x  5 Bµi lµm ............................................................................................................................................. ............................................................................................................................................. ............................................................................................................................................. ............................................................................................................................................. ............................................................................................................................................. ............................................................................................................................................. ............................................................................................................................................. ............................................................................................................................................. ............................................................................................................................................. ............................................................................................................................................. ............................................................................................................................................. ............................................................................................................................................. ............................................................................................................................................. Created by Ph¹m Quang Phong. 1 Lop10.com.

<span class='text_page_counter'>(2)</span> Hä vµ tªn: ........................................................Líp 10A1 ............................................................................................................................................. ............................................................................................................................................. ............................................................................................................................................. ............................................................................................................................................. ............................................................................................................................................. ............................................................................................................................................. 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Created by Ph¹m Quang Phong. 2 Lop10.com.

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