Пятница 13-е (9 класс)

Пятница 13-е (9 класс)

9th Grade

13 Qs

quiz-placeholder

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Пятница 13-е (9 класс)

Пятница 13-е (9 класс)

Assessment

Quiz

Mathematics

9th Grade

Practice Problem

Hard

Created by

Анна Лисицкая

Used 45+ times

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13 questions

Show all answers

1.

MULTIPLE SELECT QUESTION

45 sec • 1 pt

Media Image

Выберите рациональные дроби:

3a2+bc\frac{3a}{2}+bc

x4\frac{x}{4}

4x+9xy\frac{4x+9}{x-y}

15\frac{1}{5}

xyx-y

2.

MULTIPLE SELECT QUESTION

45 sec • 1 pt

Media Image

Выберите верные тригонометрические тождества:

sinα+cosα=1\sin\alpha+\cos\alpha=1

sin2α+cos2α=1\sin^2\alpha+\cos^2\alpha=1

tgαctgα=1tg\alpha\cdot\operatorname{ctg}\alpha=1

1tg2α=1cos2α1-tg^2\alpha=\frac{1}{\cos^2\alpha}

ctgα=cosαsinα\operatorname{ctg}\alpha=\frac{\cos\alpha}{\sin\alpha}

3.

FILL IN THE BLANK QUESTION

1 min • 1 pt

Media Image

Выполните умножение и запишите коэффициент полученного одночлена  14x39y81y321x2-\frac{14x^3}{9y}\cdot\frac{81y^3}{21x^2}  

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Media Image

 m+n3d2tmn3d2t\frac{m+n}{3d^2t}-\frac{-m-n}{3d^2t}  

 00  

 2m+n3d2t\frac{2m+n}{3d^2t}  

 2(m+n)3d2t\frac{2\left(m+n\right)}{3d^2t}  

 2m3d2t\frac{2m}{3d^2t}  

 2m+2n6d2t\frac{2m+2n}{6d^2t}  

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

 18a3b27mn:(9ab2)\frac{18a^3b^2}{7mn}:\left(9ab^2\right)  

 2a27mn\frac{2a^2}{7mn}  

 17mn\frac{1}{7mn}  

 162a4b47mn\frac{162a^4b^4}{7mn}  

 14a2mn14a^2mn  

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

 sin2αtgαctgα\sin^2\alpha-tg\alpha\cdot\operatorname{ctg}\alpha  

 11  

 cos2α-\cos^2\alpha  

 cosα\cos\alpha  

 cos2α\cos^2\alpha  

 00  

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

 m2n2(m+n)2\frac{m^2-n^2}{\left(m+n\right)^2}  

 mnm+n\frac{m-n}{m+n}  

 m+nmn\frac{m+n}{m-n}  

 mnm-n  

 mn2\frac{m-n}{2}  

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