Frações algébricas - revisão

Frações algébricas - revisão

8th - 9th Grade

20 Qs

quiz-placeholder

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Frações algébricas - revisão

Frações algébricas - revisão

Assessment

Quiz

Mathematics

8th - 9th Grade

Hard

Created by

LERTYANE LIMA

Used 19+ times

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20 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Para que valores de x a fração algébrica  37(x+8)(x7)\frac{37}{\left(x+8\right)\cdot\left(x-7\right)}  não representa um número real ?

 x=8 e x=7x=8\ e\ x=7  

 x=8 e x=7x=-8\ e\ x=-7  

 x=8 e x=+7x=-8\ e\ x=+7  

 x=8 e x=7x=8\ e\ x=-7  

2.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Qual é a forma simplificada da fração 35xecom250x3ecom\ frac {35xyz ^ 2} {50x ^ 3yz}  

?

 21z10x2-\frac{21z}{10x^2}  

 7z10x2\frac{7z}{10x^2}  

 21z-21z  

 7z7z  

3.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Qual a forma simplificada da fração  a+abaac\frac{\ a+ab}{a-ac}   ?

 1+b1c\frac{1+b}{1-c}  

 1+b1+c\frac{1+b}{1+c}  

 bc\frac{b}{c}  

 bc-\frac{b}{c}  

4.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

O valor do produto  4m5n22016m24n3m\ frac {4m ^ 5} {n ^ 2} \ cdot \ frac {20} {16m ^ 2} \ cdot \ frac {4n ^ 3} {m}  

é

 20m2n20m^2n  

 10m2n10m^2n  

 20m3n20m^3n  

 10m3n10m^3n  

5.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

 2x2y510xx22xy+y2\frac{2x-2y}{5}\cdot\frac{10x}{x^2-2xy+y^2}  Simplificando o produto

 4x(x+y)(xy)\frac{4x}{\left(x+y\right)\cdot\left(x-y\right)}  

 4x(xy)\frac{4x}{\left(x-y\right)}  

 4x(x+y)\frac{4x}{\left(x+y\right)}  

 x(xy)\frac{x}{\left(x-y\right)}  

6.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Qual o valor do quociente (a+b)(ab)÷(a+b)3(2a2b)\frac{\left(a+b\right)}{\left(a-b\right)}\div\frac{\left(a+b\right)^3}{\left(2a-2b\right)} 


 2(a+b)\frac{2}{\left(a+b\right)}  

 2(ab)\frac{2}{\left(a-b\right)}  

 2(a+b)2\frac{2}{\left(a+b\right)^2}  

 2(ab)2\frac{2}{\left(a-b\right)^2}  

7.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Que fração algébrica deve ser adicionada a 3/x para resultar na fração 8/x ?

1/x

2/x

4/x

5/x

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