# Math Help - Relative Extrema

1. ## Relative Extrema

Let f be the function with derivative given f '(x)=sin(x^2+1). How many relative extrema does f have on the interval 2<x<4.

To do this I know that I have to set the derivative equal to 0 and solve for x, but i'm not sure how to do it for this particular problem.

2. Originally Posted by rawkstar
Let f be the function with derivative given f '(x)=sin(x^2+1). How many relative extrema does f have on the interval 2<x<4.

To do this I know that I have to set the derivative equal to 0 and solve for x, but i'm not sure how to do it for this particular problem.
You posted this problem already.

http://www.mathhelpforum.com/math-he...x-2-1-0-a.html

Did you forget about this thread?