
20 câu hỏi trắc nghiệm Toán lớp 10
Quiz
•
Mathematics
•
10th Grade
•
Practice Problem
•
Hard
Hoà Bùi
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2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cho mệnh đề "Nếu x là số nguyên tố thì x2 là số lẻ". Mệnh đề đảo của mệnh đề này là:
"Nếu x2 là số lẻ thì x là số nguyên tố"
"Nếu x không phải là số nguyên tố thì x2 không là số lẻ"
"Mọi số nguyên tố đều có bình phương là số lẻ"
"Mọi số có bình phương là số lẻ đều là số nguyên tố"
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Bất phương trình x2−2x+1>0 có nghiệm là:
x∈R
x∈(−∞;1)∪(1;∞)
x∈(−∞;1)
x∈(1;∞)
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cho tam giác ABC có AB=AC, A=100∘. Số đo góc B bằng:
40∘
50∘
60∘
70∘
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Đồ thị của hàm số bậc hai y=ax2+bx+c đi qua ba điểm (1;2), (2;3) và (3;6). Hệ số a bằng:
1
2
3
4
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cho góc α thỏa mãn sinα=21. Giá trị của cosα là:
−23
−21
21
23
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cho hàm số f(x)=2x+3. Giá trị của f(−1) là:
−5
−1
1
5
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