Question

ajuda aí pfv... se tiver conta fazer tbm​

Answer 1

Resposta:

(E) -0,5

Explicação passo a passo:

$A=\frac{x-y}{xy}\:\Rightarrow \:A=\frac{\frac{2}{5}-\frac{1}{2}}{\frac{2}{5}\cdot \frac{1}{2}}$

$A=\frac{\frac{2}{5}-\frac{1}{2}}{\frac{2}{5}\cdot \frac{1}{2}}$

$A=\frac{\frac{2}{5}-\frac{1}{2}}{\frac{1}{5}}$

$A=\frac{-\frac{1}{10}}{\frac{1}{5}}$

$A=-\frac{\frac{1}{10}}{\frac{1}{5}}$

$A=-\frac{1\cdot \:5}{10\cdot \:1}$

$A=-\frac{5}{10}$

$A=-\frac{1}{2}$

$A=-0,5$