Question

Racionalize:
$\frac{15}{ \sqrt[3]{ 7^{2} } }$

Answer 1

Veja que:

$\boxed{\frac{15}{ \sqrt[3]{7^2} }=\frac{15}{7^{\frac{2}{3}}}*\frac{7^{\frac{3}{2}}}{7^{\frac{3}{2}}}=\frac{15 \sqrt{7^3} }{7}}$