
toan ds chuong 2
Authored by Nguyễn Phương
Mathematics
10th Grade
Used 10+ times

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20 questions
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1.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
(−∞;2)
[2; +∞)
(−∞;2]
(2; +∞)
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Hàm số nào dưới đây có tập xác định là R
y= 3x2+1
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Hàm số y=2x2+4x−1:
Nghịch biến trên khoảng (−∞;−1); đồng biến trên khoảng (−1;+∞)
Đồng biến trên khoảng (−∞;−1); nghịch biến trên (−1;+∞)
Nghịch biến trên khoảng (−∞;−2); đồng biến trên khoảng (−2;+∞)
Đồng biến trên khoảng (−∞;−2); nghịch biến trên khoảng (−2;+∞)
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Trong các hàm số sau hàm số nào nghịch biến trên R?
y=−πx+3
y=2x+3
y=πx+2
y=2
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Hàm số y=ax2+bx+c(a≠0) có đồ thị (P). Tọa độ đỉnh của (P) là?
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Parabol nào sau đây có đỉnh trùng với đỉnh của parabol (P):y=x2+4x
y=x2+4x+1
y=−x2+4x+1
y=2x2+8x+4
y=2x2+8x
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Bảng biến thiên bên đây là của hàm số nào trong bốn đáp án A, B, C, D?
y=−x2+4x−9
y=x2−4x−1
y=−x2+4x
y=x2−4x−5
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