Question

calcule as potências:​

Answer 1

Resposta:

a.

${4}^{ - 2} = \frac{1}{ {4}^{2} } = \frac{1}{16}$

b.

${( \frac{3}{7}) }^{ - 2} = { (\frac{7}{3} )}^{2} = \frac{49}{9}$

c.

${ (\frac{2}{5}) }^{ - 1} = \frac{5}{2} = 2.5$