Resposta:

a) 1/64

b) 1/8

c) 9/64

d) - 64/125

Explicação passo a passo:

a)

4^-3

1/4^3

(1 . 1 .1) / (4 . 4 . 4)

1/64

b) 8^-1

1/8^1

(1) / (8)

1/8

c) 8/3^-2

3/8^2

(3 . 3) / (8 . 8)

9/64

d) - 5/4^-3

- 4/5^3

- (4 . 4 . 4) / (5 . 5 . 5)

- 64/125

Resposta:

a) [tex]4^{-2}[/tex] = [tex](\frac{1}{4} )^{3} =\frac{1}{64}[/tex]

b) [tex]8^{-1}[/tex] = [tex](\frac{1}{8})^{1} = \frac{1}{8}[/tex]

c) [tex](\frac{8}{5}) ^{-2} = (\frac{5}{8}) ^{2} = \frac{25}{64}[/tex]

d) [tex](-\frac{5}{4}) ^{-3} = (-\frac{4}{5})^{3}=-\frac{64}{125}[/tex]