
неравенства
Authored by Nozima Nozima
Mathematics
University
Used 2+ times

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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Упростите выражение: 3x + 5x
8х
15х
3х*2
х+8
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Решите уравнение: x +7 = 12
х=4
х=5
х=6
х=95
3.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Упростите выражение и укажите тождество:
(a + b)^2 - (a - b)^2 = ?
4ab
2a^2 - 2b^2
a^2 + b^2
a^2 - b^2
4.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Какое из следующих равенств является тождеством?
2x + 3 = 7
x^2 - y^2 = (x - y)(x + y)
x + 2 = x + 3
3x = 2x + x + 1
5.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Какой из вариантов выражения всегда равен нулю при любых x?
(x - 1)^2 - (x^2 - 2x + 1)
x^2 - x
(x + 1)^2 - (x^2 + 2x + 1)
x^2 + 1 - (x + 1)^2
6.
OPEN ENDED QUESTION
1 min • 1 pt
Может ли неравенство превратиться в равенство при определённом значении переменной?
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7.
MULTIPLE CHOICE QUESTION
30 sec • Ungraded
Является ли выражение х^2 --4 = (х-2)(х+2) тождеством?
да
нет
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