$\"\"$

The function is $\"\"$ .

Find $\"\"$ .

Differentiate the function on each side with respect to $\"\"$ , holding $\"\"$ as a constant.

$\"\"$

Find $\"\"$ .

Differentiate the function on each side with respect to $\"\"$ , holding $\"\"$ as a constant. $\"\"$

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