Lomené výrazy - součin a podíl

Lomené výrazy - součin a podíl

8th Grade

6 Qs

quiz-placeholder

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Lomené výrazy - součin a podíl

Lomené výrazy - součin a podíl

Assessment

Quiz

Mathematics

8th Grade

Hard

Created by

Zdeněk K

Used 63+ times

FREE Resource

6 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Vypočítejte a upravte:  1x2+3x2x23\frac{1}{x^2+3x}\cdot\frac{2x^2}{3}  

 29x\frac{2}{9x}  

 2x3(x+3)\frac{2x}{3\left(x+3\right)}  

 x9\frac{x}{9}  

 23(1+3x)\frac{2}{3\left(1+3x\right)}  

Jinak

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Vypočítejte:  2xy2z34x2xyz2\frac{2xy^2z^3}{4x}\cdot\frac{2}{xyz^2}  

 yz2x2\frac{yz^2}{x^2}  

 yzx2\frac{yz}{x^2}   

 xyzxyz  

jinak

3.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Vypočítejte:  x2+2x+1x21xx22+2x\frac{x^2+2x+1}{x^2-1}\cdot\frac{x-x^2}{2+2x}  

 x2\frac{x}{2}  

 x(x1)2(x+1)\frac{x\left(x-1\right)}{2\left(x+1\right)}  

 x2-\frac{x}{2}  

jinak

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Napište podmínky existence předchozího výrazu:  x2+2x+1x21xx22+2x\frac{x^2+2x+1}{x^2-1}\cdot\frac{x-x^2}{2+2x}  

 x0x\ne0  

 x±1x\ne\pm1  

 x±1, x0x\ne\pm1,\ x\ne0  

jinak

5.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Vypočítejte:  ab+2b22ab4b2:5a+10b3a26ab\frac{ab+2b^2}{2ab-4b^2}:\frac{5a+10b}{3a^2-6ab}  

 3a10\frac{3a}{10}  

 3ab10\frac{3ab}{10}  

 3a10b\frac{3a}{10b}  

 310\frac{3}{10}  

jinak

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Udejte podmínky existence minulého výrazu:  ab+2b22ab4b2:5a+10b3a26ab\frac{ab+2b^2}{2ab-4b^2}:\frac{5a+10b}{3a^2-6ab}  

 a±2b, b0a\ne\pm2b,\ b\ne0  

 a±2b, b0, a0a\ne\pm2b,\ b\ne0,\ a\ne0  

 a2b, b0, a0a\ne2b,\ b\ne0,\ a\ne0  

jinak