Question

calcule as potências:

a)
${4}^{ - 2}$
b)
$\frac{3}{7}^{ - 2}$
$\frac{2}{5}^{ - 1}$
​

Answer 1

Resposta:

OLÁ

$a) \: 4^{ - 2} = \frac{1}{4^{2} } = \frac{1}{16} \\ \\ b) \: ( \frac{3}{7} )^{ - 2} = ( \frac{7}{3} )^{2} = \frac{49}{9} \\ \\ c) \: ( \frac{2}{5} )^{ - 1} = ( \frac{5}{2} ) = \frac{5}{2} \\ espero \: ter \: ajudado$