$\"\"$

The equation is $\"\"$ .

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

$\"\"$ .

$\"\"$

$\"\"$ .

$\"\"$

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

$\"\"$

The Quotient rule of Derivatives: $\"\"$ .

$\"\"$

$\"\"$ .

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

$\"\"$

$\"\"$ .