$\"\"$

\

(a) Need to verify $\"\"$ .

\

Consider Left hand side $\"\"$ .

\

Let $\"\"$

\

$\"\"$

\

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

\

$\"\"$

\

$\"\"$

\

$\"\"$ .

\

If $\"\"$ , then $\"\"$ .

\

If $\"\"$ , then $\"\"$ .

\

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

\

Apply limits: $\"\"$ to $\"\"$ .

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

= Right hand side.

\

$\"\"$ .

\

$\"\"$

\

(b) Need to verify $\"\"$ .

\

Consider Left hand side $\"\"$ .

\

Let $\"\"$

\

$\"\"$

\

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

\

$\"\"$

\

$\"\"$

\

$\"\"$ .

\

If $\"\"$ , then $\"\"$ .

\

If $\"\"$ , then $\"\"$ .

\

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

\

Apply limits: $\"\"$ to $\"\"$ .

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

= Right hand side.

\

$\"\"$ .

\

$\"\"$

\

(a) $\"\"$ .

\

(b) $\"\"$ .