$\"\"$

The function is $\"\"$ .

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

$\"\"$

$\"\"$ .

Find the relative extrema by equating $\"\"$ .

$\"\"$

$\"\"$ .

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

$\"\"$

$\"\"$ .

The relative extrema point is $\"\"$ .

$\"\"$

Determine the relative extrema, using second derivative test.

Apply second derivative with respect to $\"\"$ .

$\"\"$

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

From the second derivative test, $\"\"$ is neither maximum nor minimum.

Graph the function $\"\"$ .

$\"\"$

But graphically, $\"\"$ is relative minimum.

$\"\"$

The relative minimum at $\"\"$ .