Question

num entendi nada me ajuda aí pfv​

Answer 1

Resposta:

a) 0,25

b) 91

c) 0

Explicação passo a passo:

a) $\left(\frac{2}{3}\right)^{-2}-4^{\frac{1}{2}}$

$=\frac{3^2}{2^2}-2$

$=\frac{9}{4}-2$

$=-\frac{2\cdot \:4}{4}+\frac{9}{4}$

$=\frac{-2\cdot \:4+9}{4}$

$=\frac{1}{4}$

$=0,25$

b) $1000^{\frac{1}{3}}+\left(\frac{1}{9}\right)^{-2}$

$=10+9^2$

$=10+81$

$=91$

c) $\left(\frac{8}{125}\right)^{-\frac{1}{3}}-\left(\frac{25}{4}\right)^{\frac{1}{2}}$

$=\frac{5}{2}-\frac{5}{2}$

$=0$