#Mark the correct alternative in each of the following
is maximum when x =
Differentiating f(x) with respect to x, we get
Differentiating f’(x) with respect to x, we get
For maxima at x=c, f’(c)=0 and f’’(c)<0
f’(x)=0⇒ or
and
>0
Hence, is a point of maxima for f(x).