Kiểm tra chương IV lớp: 8 môn: Đại số (thời gian: 45 phút)

Họ Tên:......................................... KIỂM TRA CHƯƠNG IV
Lớp: 8 MÔN: ĐẠI SỐ (Thời gian:45 phút)
ĐIỂM
NHẬN XÉT CỦA GIÁO VIÊN
ĐỀ BÀI
Câu 1: Cho a > b hãy so sánh 
a) 2a với 2b; b) -3a với -3b
Câu 2: Cho a < b hãy chứng tỏ rằng 2a + 3 < 2b + 5
Câu 3: a) Thế nào là BPT bậc nhất một ẩn?
 b) Cho 3 VD minh họa?
Câu 4: Giải các bất phương trình sau và biểu diễn tập nghiệm trên trục số:
a) 5x - 3 > 3x + 5; b) 2x. ( x - 3 ) + x2 > 3x. ( x + 1 ) +4
Câu 5: Tìm x sao cho giá trị của biểu thức 2x + 1 không lớn hơn giá trị của biểu thức x + 3.
Câu 6: Giải phương trình sau: | 3 x - 2 | = 5x + 1
BÀI LÀM
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