неравенства

неравенства

University

10 Qs

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Assessment

Quiz

Mathematics

University

Medium

Created by

Nozima Nozima

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

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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OFF

7.

MULTIPLE CHOICE QUESTION

30 sec • Ungraded

Является ли выражение х^2 --4 = (х-2)(х+2) тождеством?

да

нет

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