#Mark the correct alternative in each of the following
For the function
In such type of questions
find both the maximum and minimum value to compare the options.
so first,
so,
put f’(x)=0;
⇒ x=±1
Hence by second derivative test
f’’(x)>0 or f”(x)<0
so it’s a point of minimum or maximum respecctively.
f”(-1)=-2<0;
f”(1)=2>0
so x=1 is a point of minimum
and x=-1 is a point of maximum
f(1)=2 is minimum value.
f(-1)=-2 is maximum value.
therefore,
maximum value<minimum value.