Đề kiểm tra chương IV môn Hình học Lớp 9 - Trường THCS Phú Diên

Trường THCS Phú Diên
Họ và tên:........................................
Lớp:9/..............................................
KIỂM TRA CHƯƠNG IV
Môn: Đại số 9 – Thời gian 45 phút
(Không kể phát đề)
ĐIỂM
ĐỀ KIỂM TRA:
I/ Trắc nghiệm: (3 điểm) Khoanh tròn chữ cái đứng trước kết quả đúng của các câu sau:
Câu 1: Đồ thị hàm số y = x2 đi qua điểm:
A. ( 0; 1 )
B. ( - 1; 1)
C. ( 1; - 1 )
D. (1; 0 )
Câu 2: Đồ thị hàm số y = ax2 đi qua điểm A(3; 12). Khi đó a bằng
A. 
B. 
C. 4
D. 
Câu 3: Phương trình (m + 1)x2 – 2mx + 1 = 0 là phương trình bậc hai khi:
A. m = 1.
B. m ≠ -1.
C. m = 0.
D. mọi giá trị của m.
Câu 4: Phương trình x2 – 3x + 7 = 0 có biệt thức ∆ bằng
A. 2.
B. -19.
C. -37.
D. 16.
Câu 5: Cho phương trình 0,1x2 – 0,6x – 0,8 = 0. Khi đó:
A. x1 + x2 = 0,6; x1.x2 = 8.
B. x1 + x2 = 6; x1.x2 = 0,8.
C. x1 + x2 = 6; x1.x2 = 8.
D. x1 + x2 = 6; x1.x2 = - 8.
Câu 6: Phương trình x2 + 5x - 6 = 0 có 2 nghiệm là:
A. x1 = 1 ; x2 = - 6
B. x1 = 1 ; x2 = 6
C. x1 = - 1 ; x2 = 6
D. x1 = - 1 ; x2 = - 6
II/ Tự luận: (7 điểm)
Câu 1: (3 điểm) 
Giải phương trình x2 + 6x + 8 = 0
Tìm hai số u và v biết: u + v = -2, uv = -15
Câu 2: (2 điểm). Cho hai hàm số y = x2 và y = x - 
Vẽ đồ thì hai hàm số này trên cùng một mặt phẳng tọa độ.
Tìm tọa độ giao điểm của hai đồ thị đó.
Câu 3: (2 điểm) Cho phương trình . Với giá trị nào của m thì phương trình có hai nghiệm x1, x2 ? Khi đó dùng hệ thức Vi-ét, tìm m để .
	BÀI LÀM
....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
..............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................