Question

Calcule as potências :(3/7)^- 2 e (1/3)^-3 *

Answer 1

Explicação passo-a-passo:

$( \frac{3}{7} ) {}^{ - 2} = ( \frac{7}{3} ) {}^{2} = \frac{49}{9} . \\ \\ ( \frac{1}{3} ) {}^{ - 3} = ( \frac{3}{1} ) {}^{3} = \frac{27}{1} = 27.$