Step 1:

The function is on interval .

Apply derivative on each side with respect to .

.

Step 2:

Find the critical numbers of on the interval by solve .

Apply formula .

and

and

and .

Consider solutions in the interval .

The solutions of are not in the interval .

The solution of is .

Step 3:

Substitute in .

.

Find the values of the function at the end points of the interval .

.

.

The function has absolute maximum is .

The function has absolute maximum is .

Solution:

The function has absolute maximum is .

The function has absolute maximum is .