$\"\"$

\

The function is $\"\"$ .

\

Apply derivative with respect to x .

\

$\"\"$

\

Apply the chain rule of derivatives .

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

Find the derivative at extremes:

\

The derivative at a point $\"\"$ is

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

The derivative at a point $\"\"$ is

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

$\"\"$ and $\"\"$ .