Question

Someone please help me with this

Answer 1

$\frac{1}{3}\sqrt[3]{81}=\\\frac{1}{3}\sqrt[3]{{3}^{3}\times3}=\\\frac{1}{3}\sqrt[3]{{3}^{3}}\sqrt[3]{3}=\\\frac{1}{3}\times3\sqrt[3]{3}=\\\frac{3}{3}\sqrt[3]{3}=\sqrt[3]{3}$

The answer is

$\sqrt[3]{3}$