Find the critical point and the interval on which the given function is increasing or decreasing, and apply the First Derivative Test to the critical point. Let
[math]

Critical Point =

Is [math] a maximum or minumum at the critical point?

The interval on the left of the critical point is .
On this interval, [math] is while [math] is .

The interval on the right of the critical point is .
On this interval, [math] is while [math] is .