Đề kiểm tra môn Đại số 10 chuẩn (Bài số 3) - Năm học 2012-2013 - Trường THCS Krông Ana

 TRƯỜNG THPT KRÔNG ANA KIỂM TRA TẬP TRUNG NĂM HỌC 2012 – 2013.
 TỔ TOÁN MÔN ĐẠI SỐ 10 chuẩn (Bài số 3)
   Thời gian 45 phút (kể cả thời gian giao đề)
 Họ và tên: .................................................................................Lớp: ......... Điểm:
 ĐỀ BÀI
 Bài 1 (4,5 điểm): Giải các bất phương trình sau:
 9x2 2
 a) 1 x 2x 1 b) (4x 7)(3 2x) 0 c) 2 
 x 1
 5
 6x 4x 7
 7
 Bài 2 (1,5 điểm): Tìm tất cả các nghiệm nguyên của hệ bất phương trình: 
 8x 3
 2x 25
 2
 5
 Bài 3 (1 điểm): Tìm GTLN của hàm số: y (x 3)(5 2x) , với 3 x 
 2
 Bài 4 (1,5 điểm): Tìm m để bất phương trình m2 x m2 mx 4 có tập hợp nghiệm là S ¡ 
 Bài 5. (1,5 điểm) Chứng minh rằng: 2a 1 3 2b ab 3 48ab , với a 0;b 0
 BÀI LÀM
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