KTHK 2 Toán 9 - Đề 2
Quiz
•
Mathematics
•
9th Grade
•
Practice Problem
•
Hard
Thanh Phong
Used 2+ times
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12 questions
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1.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Nghiệm của hệ phương trình sau là
(1; -1)
(1; 1)
(-1; -1)
(-1; 1)
2.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Xác định số nghiệm của hệ phương trình
Vô nghiệm
1 nghiệm
Vô số nghiệm
2 nghiệm
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Trong các hàm số sau, hàm số nào có dạng của hàm số y = ax2
y= 52x
y = 2x + 1
y = -2x2
y = x2 + 2
4.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Phương trình ax2 + bx + c = 0 (a ≠ 0) vô nghiệm khi biệt số đen - ta là
Δ > 0
Δ = 0
Δ < 0
5.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Để phương trình x2 - x + m = 0 có nghiệm kép thì m bằng
0
1
6.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Nếu x1 + x2 = 5 và x1. x2= 6 thì x1, x2 là nghiệm của phương trình
x2 + 5x - 6 = 0
x2 - 5x + 6 = 0
x2 - 5x - 6 = 0
x2 + 5x + 6 = 0
7.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Cho hình vẽ bên biết ∠BAC = 700. Hỏi số đo góc BOC bằng bao nhiêu?
700
1100
350
1400
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