2 ĐỀ HK1 TOÁN 9

KỲ KIỂM TRA HỌC KÌ I NĂM HỌC 2017 – 2018
MÔN: TOÁN 9
Thời gian : 90 phút
(Không kể thời gian phát đề)
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ĐỀ CHÍNH THỨC
(Thí sinh không phải chép đề vào giấy thi)
I. Lý thuyết: (2,0 điểm)Câu 1: (1,0 điểm)Phát biểu định nghĩa và tính chất của hàm số bậc nhất?
Câu 2: (1,0 điểm)Phát biểu định lý về tính chất của hai tiếp tuyến cắt nhau.
II. Bài toán: (8,0 điểm)Bài 1: (1,0 điểm)
Thực hiện phép tính:

Bài 2: (2,0 điểm)Cho biểu thức:

a) Rút gọn biểu thức B. b) Tìm giá trị của B khi a = 2 ; b = – 1

Bài 3: (2,0 điểm) a) Vẽ trên cùng một mặt phẳng tọa độ đồ thị của các hàm số sau :
y = 2x + 1 (1) ; y = 3 – 2x (2)
b) Tìm tọa độ giao điểm của hai đường thẳng trên.
Bài 4: (3,0 điểm)



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