Question

Questão 37 .

 

Para x = 4, o valor de [ (x⁻²)² + x elevado a ½ . x⁻³ ] ÷ x⁻⁵ é:

 

Resposta : 36

 

OBS: RESPONDA E EXPLIQUE .. PLEASE .. OBRIGADA..

Answer 1

$\frac{[(x^{-2})^2+x^{\frac{1}{2}}.x^{-3}]}{x^{-5}}$

$\frac{[(4^{-2})^2+4^{\frac{1}{2}}.4^{-3}]}{4^{-5}}$

$\frac{[4^{-4}+2.4^{-3}]}{4^{-5}}$

$\frac{[(2^2)^{-4}+2.(2^2)^{-3}]}{(2^2)^{-5}}$

$\frac{2^{-8}+2^{-5}}{2^{-10}}$

$\frac{2^{-8}}{2^{-10}} + \frac{2^{-5}}{2^{-10}}$

$2^2+2^5$

$4+32$

$\Large{\boxed{36}}$