KTHK2 Toán 9 - Đề 3
Quiz
•
Mathematics
•
9th Grade
•
Practice Problem
•
Medium
Thanh Phong
Used 29+ times
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12 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Phương trình nào sau đây là phương trình bậc nhất hai ẩn?
x2 = 3
3x4 – 7x + 5 = 0
x + y = 2
– 3x3 = 1
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Tập nghiệm của hệ phương trình
(2; 1)
(-2; -1)
(-2; 1)
(2; -1)
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Tổng và tích hai nghiệm của phương trình x2 - 12x - 6 = 0 là
x1 + x2 = 6
x1.x2 = -12
x1 + x2 = 12
x1.x2 = -6
x1 + x2 = -12
x1.x2 = 6
x1 + x2 = -12
x1.x2 = -6
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Phương trình 3x2 - 6x – 9 = 0 có nghiệm là
1; -3
1; 3
-1; -3
-1; 3
5.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Cho phương trình bậc hai một ẩn 18x2 - 12x – m = 0 với tham số m. Giá trị của m để phương trình đã cho vô nghiệm là
m > 2
m > -2
m < -2
m < 2
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Hàm số nào sau đây có dạng y = ax2 ?
y = x2 - 1
y = 2x - 1
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Chu vi của đường tròn là 15,7 cm. Vậy bán kính của đường tròn là
5,2
2,5
5
7,85
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