Resposta:
Explicação passo-a-passo:
a) [tex]8^{\frac{1}{2} } = (2^{3})^{\frac{1}{2} } = 2^{\frac{3}{2} } = \sqrt{2^{3} } = \sqrt{2 . 2.2} = \sqrt{2^{2}.2 } = 2\sqrt{2}[/tex]
b) [tex]10^{-3} = (\frac{1}{10})^{3} = \frac{1^{3} }{10^{3} } = \frac{1}{1000} = 0,001[/tex]
c) [tex]\frac{4}{8}^{-2} = \frac{8}{4}^{2} = \frac{8^{2} }{4^{2} }} =\frac{64}{16} = 4[/tex]
