Question

Observe as igualdades a seguir .Estao corretas :

Answer 1

Resposta:

I) $\sqrt{\frac{16}{25} } =\frac{\sqrt{16} }{\sqrt{25} } =\frac{4}{5}$       ( V )

II) $\sqrt[3]{\frac{27}{64} } =\frac{\sqrt[3]{27} }{\sqrt[3]{64} } =\frac{3}{4}$      ( V )

III) $\sqrt{0,81}=\sqrt{\frac{81}{100} } =\frac{\sqrt{81} }{\sqrt{100} } =\frac{9}{10} =0,9$   ( V )

Veja que:

I)    $\sqrt{\frac{16}{25} } =\sqrt{\frac{4^{2} }{5^{2} } } =\frac{5}{4}$

II) $\sqrt[3]{\frac{27}{64} } =\sqrt[3]{\frac{3^{3} }{4^{3} } } =\frac{3}{4}$

III) $\sqrt{0,81}=\sqrt{\frac{81}{100} } =\sqrt{\frac{9^{2} }{10^{2} } }=\frac{9}{10}=0,9$

bons estudos!