# High School Math : Finding Maxima and Minima

## Example Questions

### Example Question #1 : Derivatives

The function is such that When you take the second derivative of the function , you obtain What can you conclude about the function at ?

The point is a local maximum.

The point is an absolute maximum.

The point is an absolute minimum.

The point is an inflection point.

The point is a local minimum.

The point is an inflection point.

Explanation:

We have a point at which . We know from the second derivative test that if the second derivative is negative, the function has a maximum at that point. If the second derivative is positive, the function has a minimum at that point. If the second derivative is zero, the function has an inflection point at that point.

Plug in 0 into the second derivative to obtain So the point is an inflection point.

### Example Question #1 : Derivatives

Consider the function Find the maximum of the function on the interval .      Notice that on the interval , the term is always less than or equal to . So the function is largest at the points when . This occurs at and .
Plugging in either 1 or 0 into the original function yields the correct answer of 0. 