Resposta:
[tex]a) \frac{ \sqrt[5]{256} }{ \sqrt[5]{32} } = \frac{4}{2} = 2[/tex]
[tex]b) \frac{ \sqrt{256} }{ \sqrt[3]{16} } = \frac{16}{ \sqrt{2 {}^{3} .2} } = \frac{16}{2 \sqrt{3} } = \frac{8}{ \sqrt{3} } = \frac{8. \sqrt{3} }{ \sqrt{3} . \sqrt{3} } = \frac{8 \sqrt{3} }{ \sqrt{9} } = \frac{8 \sqrt{3} }{3} [/tex]
