Working with Fractional Exponents

$\displaystyle {\sqrt[{{n}}]{{x}}}={x}^{{\frac{{1}}{{n}}}}$

The nth root of $\displaystyle {x}$ is the same as $\displaystyle {x}$ raised to the $\displaystyle \frac{{1}}{{n}}$ power.

Complete this expression.
$\displaystyle {\sqrt[{{b}}]{{z}}}$= Preview Question 6 Part 1 of 4  

Simplify the following expression completely.
$\displaystyle {\sqrt[{{11}}]{{{w}^{{13}}}}}$ = Preview Question 6 Part 2 of 4  

Simplify the following.
$\displaystyle {\sqrt[{{3}}]{{{8}}}}$ = Preview Question 6 Part 3 of 4  

Simplify.
$\displaystyle {243}^{{\frac{{1}}{{5}}}}$ = Preview Question 6 Part 4 of 4