$\"\"$

The function is $\"\"$ .

Differentiate on each side with respect to $\"\"$ .

$\"\"$

Apply product rule of derivatives: $\"\"$ .

$\"\"$

Again differentiate.

$\"\"$

Quotient rule of derivatives: $\"\"$ .

$\"\"$

$\"\"$ .

Second derivative of the function is $\"\"$ .

$\"\"$

Second derivative of the function is $\"\"$ .