Формулы 9 класс

Формулы 9 класс

9th Grade

21 Qs

quiz-placeholder

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Формулы 9 класс

Формулы 9 класс

Assessment

Quiz

Mathematics

9th Grade

Practice Problem

Hard

Created by

Oksana Shinalskaja

Used 12+ times

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21 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

Обратная пропорциональность задаётся

y=axy=ax

y=axy=\frac{a}{x}

x=yax=\frac{y}{a}

y=ax+b

2.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

Периметр ромба

d22\frac{d^2}{2}

2(a+b)

4a

ah

3.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

Площадь боковой поверхности пирамиды

πrm\pi rm

2πrH2\pi rH

CHCH

Pm2\frac{Pm}{2}

4.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

Формула дискриминанта

b±D2a\frac{-b\pm\sqrt{D}}{2a}

b24ac-b^2-4ac

b24acb^2-4ac

b2acb^2-ac

5.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

Объём цилиндра

2πrH2\pi rH

πdH\pi dH

πr2H\pi r^2H

13Sосн.H\frac{1}{3}S_{осн.}\cdot H

6.

MULTIPLE SELECT QUESTION

45 sec • 1 pt

(b+a)(a-b)

b2a2b^2-a^2

a2b2a^2-b^2

(ab)2\left(a-b\right)^2

(ba)2\left(b-a\right)^2

7.

MULTIPLE SELECT QUESTION

45 sec • 1 pt

Что верно?

ab=ab\sqrt{a}\cdot\sqrt{b}=\sqrt{ab}

a+b=a+b\sqrt{a}+\sqrt{b}=\sqrt{a+b}

ab=ab\frac{\sqrt{a}}{\sqrt{b}}=\sqrt{\frac{a}{b}}

ab=ab\sqrt{a-b}=\sqrt{a}-\sqrt{b}

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