Question

What’s (2a) with an exponent of 6/5 in radical form?

Answer 1

Answer: Choice A

Reason:

Use the rule that $a^{b/c} = \sqrt[c]{a^b} = \left(\sqrt[c]{a}\right)^b$

This means, $(2a)^{6/5} = \sqrt[5]{(2a)^6} = \boldsymbol{\left(\sqrt[5]{2a} \ \right)^6}$

As another example, $m^{2/3} = \sqrt[3]{m^2} = \left(\sqrt[3]{m} \ \right)^2$