$\"\"$

\

Quotient rule for derivatives: If $\"\"$ and $\"\"$ are differentiable at $\"\"$ and $\"\"$ , then

\

$\"\"$ .

\

The function is $\"\"$ .

\

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

\

$\"\"$

\

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

\

$\"\"$

\

$\"\"$ .

\

Consider $\"\"$ .

\

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

\

$\"\"$

\

$\"\"$ .

\

Apply quotient rule of derivative: $\"\"$ .

\

Substitute $\"\"$ , $\"\"$ , $\"\"$ and $\"\"$ .

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

$\"\"$ .

\

Therefore, the derivative of $\"\"$ is $\"\"$ .

\

$\"\"$

\

The derivative of $\"\"$ is $\"\"$ .