Write the maximum value of 
if it exists.
Let 
Clearly 
(
) only defined for 
>0. 
and 
.(
So, 
⇒ x=e and f'' (e)<0
So, x=e is a point of maxima. Therefore, 
1
Write the maximum value of if it exists.
Let Clearly () only defined for >0. and .(
So,
⇒ x=e and f'' (e)<0
So, x=e is a point of maxima. Therefore,