
Bài tập cuối chương II - Toán 9
Quiz
•
English
•
9th Grade
•
Practice Problem
•
Medium
Dịu Bùi
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6 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Chọn khẳng định sai trong các khẳng định sau:
Nếu a < b thì a + c < b + c
Nếu a>b thì a-c>b-c.
Nếu a≥b và c<0 thì ac≤bc.
Nếu a≤b và c>0 thì ac≥bc.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Nghiệm của bất phương trình -7(3x + 5) ≥ 0
x > 5/3
x ≤ -5/3.
x ≥ -5/3
x > -5/3
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cho x ≤ y. Khẳng định nào sau đây sai?
1 + 2x ≤ 1 + 2y
-x - 3 ≤ -y - 3.
-3x ≥ -3y
15y + 1 ≥ 15x + 1
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Giải bất phương trình
x < 8
x > -8
x > 8
x < -8
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Một người đi bộ một quãng đường dài 18km trong khoảng thời gian không nhiều hơn là 4 giờ. Lúc đầu người đó đi với vận tốc 5km/h, về sau đi với vận tốc 4km/h. Xác định độ dài đoạn đường tối thiểu mà người đó đã đi với vận tốc 5km/h ?
11km
8km
9km
10km.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Giải bất phương trình sau : 3(x+2)(x-2) ≤ 3x²+x
x > 14
x ≤ -12
x ≥ -12
x < 14
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