Fighting
Quiz
•
Mathematics
•
9th Grade
•
Practice Problem
•
Hard
Nguyễn Yến
Used 823+ times
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8 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Phương trình x2 – 3x + 5 = 0 có biệt thức ∆ bằng
A. - 11
B. -29
C. -37
D. 16
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Phương trình (m + 2)x2 – 2mx + 1 = 0 là phương trình bậc hai khi:
A. m ≠ 1
B. m ≠ -2
C. m ≠ 0
D. mọi giá trị của m
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Số nghiệm của phương trình : x2 - 8x + 16 là:
vô số nghiệm
2 nghiệm phân biệt
vô nghiệm
nghiệm kép
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Phương trình nào sau đây là phương trình bậc hai một ẩn ?
A. -5x + 1 = 0
B. 2x3 - 10x + 7 = 0
C.
D.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cho đường tròn (O) đường kính AB, M là điểm nằm trên đường tròn (M khác A và B). Số đo góc AMB bằng:
A. 900
B. 3600
C. 1800
D. 450
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Hình tròn ngoại tiếp lục giác đều cạnh 5cm có diện tích là :
A. 78,5 cm2
B. 31,4 cm2
C. 50,24 cm2
D. 75,8 cm2
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
AB là một cung của (O; R) với sđ cung nhỏ là 800. Khi đó, góc có số đo là:
A. 1800
B. 1600
C. 1400
D. 800
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