$\"\"$ .

\

$\"\"$

\

Apply product rule : $\"\"$ .

\

$\"\"$

\

Apply power rule : $\"\"$ .

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

$\"\"$ .

\

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