$\"\"$

\

The function is $\"\"$ , $\"\"$ .

\

Area of the region is $\"\"$ .

\

Where $\"\"$ and $\"\"$ .

\

Let number of sub intervals be $\"image\"$ .

\

$\"\"$

\

$\"\"$ .

\

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

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

$\"\"$

\

Apply summation formula $\"\"$ .

\

Apply summation formula $\"\"$ .

\

Apply summation formula $\"\"$ .

\

$\"\"$

\

As $\"\"$ , then $\"\"$ .

\

$\"\"$

\

$\"\"$

\

\

$\"\"$ .

\

Area of the region is between $\"\"$ and $\"\"$ -axis is $\"\"$ sq-units.

\

$\"\"$

\

Graph the region:

\

$\"\"$

\

Area of the region is $\"\"$ sq-units.

\

$\"\"$

\

Area of the region is $\"\"$ sq-units.