
Bất đẳng thức
Authored by Mỹ Trần
Mathematics
10th Grade
Used 30+ times

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15 questions
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1.
MULTIPLE CHOICE QUESTION
30 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
30 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
x < 4
x > -4
-4 < x < 4
-2 < x < 2
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
|x| ≥ 2 thì
x ≥ 2 hoặc x ≤ -2
x > 2 hoặc x < -2
-2 < x < 2
-2 ≤ x ≤ 2
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
|2x| < 10 thì ...
-20 < x < 20
-10 < x < 10
-5 < x < 5
x > 10 hoặc x < -10
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
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