The function is
and
.
Area of the region :
\If
is continuous and non-negative on the closed interval
, then the area of the region bounded by the graph
, the
-axis (
) and the vertical lines
and
is given by
.
Area of the bounded region is
.
Consider
.
Apply derivative on each side.
\

.
Change of integral limits:
\If
then
.
If
then
.
Substitute
and
and change of limits in
.








.
The area of the bounded region is
.
The area of the bounded region is
.