$\"\"$

\

The function is $\"\"$ .

\

$\"\"$ .

\

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

\

$\"\"$

\

$\"\"$

\

$\"\"$ .

\

For finding the intervals of increase or decrease substitute $\"\"$ .

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

Take logarithm on each side.

\

$\"\"$

\

$\"\"$

\

$\"\"$ .

\

$\"\"$

\

$\"\"$

\

Therefore, the intevals are $\"\"$ and $\"\"$ .

\

Consider the test interval is $\"\"$ .

\

Consider test point as $\"\"$ .

\

Substitute $\"\"$ in $\"\"$ .

\

$\"\"$

\

$\"\"$

\

$\"\"$ .

\

Hence the function is decreasing in the interval $\"\"$ .

\

Consider the test point is $\"\"$ .

\

Consider test point as $\"\"$ .

\

Substitute $\"\"$ in $\"\"$ .

\

$\"\"$

\

$\"\"$

\

Hence the function is increasing in the interval $\"\"$ .

\

$\"\"$

\

The function $\"\"$ is increasing in the inerval $\"\"$ .