$\"\"$

The expression is $\"\"$ .

For any real number $\"\"$ and any positive integer $\"\"$ , $\"\"$ .

$\"\"$ (Definition of $\"\"$ )

$\"\"$ (Substitute $\"\"$ )

$\"\"$ (Power of a power)

$\"\"$ (Simplify)

$\"\"$

The radical form of the expression is $\"\"$ .