Question

15)calcule
OBS:APENAS B,C,D,F

Answer 1

Bom dia!!!

$b) \: ( \frac{5}{7} ) ^{2} = ( \frac{7}{5} ) ^{2} = \frac{49}{25} \\ \\ c) \: ( \frac{2}{3} ) ^{ - 4} = ( \frac{3}{4} ) ^{4} = \frac{81}{16} \\ \\ d) \: {5}^{ - 3} = \frac{1}{ {5}^{3} } = \frac{1}{125} \\ \\ f) \: ( \frac{6}{3} )^{ - 1} = {2}^{ - 1} = \frac{1}{2}$

Espero ter ajudado!