Question

calcule as potências

Answer 1

a)
${7}^{ - 1} = \frac{1}{7}$
b)
$( \frac{1}{5} {)}^{ - 2} = {5}^{2} = 25$
c)
$( - 0.5) ^{ - 4} = ( - \frac{1}{2} {)}^{ - 4} = ( - 2 {)}^{4} = 16$
d)
$( \frac{5}{9} {)}^{ - 1} = \frac{9}{5} = 1.8$
e)
$( - \frac{3}{8} {)}^{ - 1} = - \frac{8}{3}$
f)
$( - 3 {)}^{ - 3} = ( - \frac{1}{3} {)}^{3} = - \frac{1}{27}$
g)
$( - \frac{3}{2} {)}^{ - 2} = ( - \frac{2}{3} {)}^{2} = \frac{4}{9}$
h)
$( \frac{7}{4} {)}^{ - 2} = ( \frac{4}{7} {)}^{2} = \frac{16}{49}$