$\"\"$

The function is $\"\"$ and the point is $\"\"$ .

$\"\"$ .

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

$\"\"$

Substitute $\"\"$ in the above equation.

$\"\"$

$\"\"$ .

Therefore, $\"\"$ .

$\"\"$

The derivative function $\"\"$ is $\"\"$ at $\"\"$ .