Question

calcule as potencias

a)
$( + \frac{2}{5} ) {}^{3}$
B)
$( - \frac{1}{4} ) {}^{2}$

Answer 1

$a) ( + \frac{2}{5} ) {}^{3} = ( + \frac{2}{5}) \times ( + \frac{2}{5}) \times ( + \frac{2}{5}) = \frac{8}{125} \\ \\ B)( - \frac{1}{4} ) {}^{2} = ( - \frac{1}{4} ) \times ( - \frac{1}{4} ) = \frac{1}{16}$