Kiểm tra 45 phút môn Đại số 10

Kiểm tra 45p môn đại số 10 Họ và tên: Lớp: Đề bài: I, Trắc nghiệm khách quan: (2đ) Khoanh tròn vào đáp án đúng trong mỗi câu sau đây: Câu 1: Bất phương trình tương đương với bất phương trình: (A) (B) < 0 (C) 0 (D) < 0 Câu 2: Hệ bất phương trình sau vô nghiệm: (A) (B) (C) (D) II, Tự luận: ( 8đ ) Bài 1: (2,0 đ ). Biểu diễn tập nghiệm của bất phương trình: x 3y > 0 Bài 2:(4,0 đ ) 1) Lập bảng xét dấu của biểu thức: f(x) = 2) Giải bất phương trỡnh Bài 3: (2,0 đ ) Cho phương trình: Tìm m = ? để phương trình có 2 nghiệm trái dấu. Bài làm: ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ...................................................................................................................................................