$\"\"$

The function is $\"\"$ .

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

$\"\"$ .

The product rule of the Derivative: $\"\"$

$\"\"$

$\"\"$ .

$\"\"$

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

$\"\"$ .

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

$\"\"$

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

$\"\"$

$\"\"$ .