$\"\"$

The function is $\"\"$ , $\"\"$ .

Apply derivative on each side with respect to $\"\"$ .

$\"\"$

Find the critical numbers of $\"\"$ , by equating $\"\"$ to zero.

$\"\"$

$\"\"$ .

Since $\"\"$ then test intervals are $\"\"$ and $\"\"$ .

\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \

Therefore $\"\"$ is decreasing on $\"\"$ and increasing on $\"\"$ .

As $\"\"$ changes its sign from positive to negative, $\"\"$ has an absolute minimum at $\"\"$ .

Substitute $\"\"$ in $\"\"$ .

$\"\"$

Absolute minimum of the function is $\"\"$ .

$\"\"$

Absolute minimum of the function is $\"\"$ .