
Toán 9 câu
Quiz
•
Mathematics
•
9th - 12th Grade
•
Easy
Nhi Giang
Used 3+ times
FREE Resource
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27 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Tìm tất cả các giá trị thực của tham số m để hàm số y = log(x² - 2x - m + 1) xác định với mọi số thực x
m>=0
m<0
m≤2
m>2
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Giá trị của biểu thức sin π/8cosπ/8cosπ/4
√2/2
√3/2
1/4
1/2
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Với mọi ,mệnh đề nào sau đây sai ?
-1<=sin a<=1
-1<=cos a<=1
Cos2 a - sin2a =1
Cos2a + sin2a =1
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Mệnh đề nào sau đây sai ?
Sin π/4=√2/2
Cos π/4=√2/2
Tan π/4=1
Cot π/4 =√2
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Phương trình tanx =1/√3 có một nghiệm là
x=5
x=π/6
x=3
x=4
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Phương trình nào sau đây vô nghiệm
Sin x = 2020
Tan x = 2019
Sin x = 1/2
Cos x = 1
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Số nghiệm của phương trình 2 cos x = √ 3 thuộc đoạn [0 ;5π/2] là
1
3
4
2
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