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Quiz
•
Mathematics
•
8th - 10th Grade
•
Practice Problem
•
Medium
Chí Thượng
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10 questions
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1.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Nếu a < b thì
a + c < b +c
a + c > b +c
a + c < b +d
-3a < -3b
2.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Nếu a > b và c > d thì
a + c < b + d
a + c > b + d
ac > bd
ac < bd
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Với a, b > 0. Mệnh đề nào sau đây đúng?
a < b => a + 2 > b + 2
a > b => -a > -b
a < b => a2 < b2
a < b => a - 3 > b - 3
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
6xy
4xy
2xy
-2xy
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Với a, b không âm thì
1
2
3
4
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Theo Cô si thì ...
3
9
12
6
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
thì
x < 4
x > -4
-4 < x < 4
-2 < x < 2
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