Question

##30PONTOS##URGENTE##

Calcule as potências a) (3/7)⁻² = b) (2/5)⁻¹ = c) (1/3)⁻³ = d) (-5/4)⁻³ = e) (-1/3)⁻² = f) (-2/5)⁻³ =

Answer 1

Explicação passo-a-passo:

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

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

$c) \: ( \frac{1}{3} {)}^{ - 3} = ( \frac{3}{1} {)}^{3} = {3}^{3} = 27$

$d) \: ( - \frac{5}{4} {)}^{ - 3} = ( - \frac{4}{5} {)}^{3} = - \frac{64}{125}$

$e) \: ( - \frac{1}{3} {)}^{ - 2} = ( - 3 {)}^{2} = 9$

$f) \: ( - \frac{2}{5} {)}^{ - 3} = ( - \frac{5}{2} {)}^{3} = - \frac{125}{8}$

Answer 2

Resposta:

espero ter te ajudado.❤