(13)
\Step 1:
\The curve 

-axis equation is 
Formula for area between the curve and
-axis is 
Find the limits by equating
forms.

and 
and 
In this case
and
.
Step 2:
\Substitute the values
and
in
.








square units..
Solution :
\
square units.
(14)
\

\ \




and 
and 
and 







\



(15)
\
and





,
and 
,
and 












