# Rolle's theorem problem

1. Mar 30, 2007

### afcwestwarrior

verify that the 3 hypothesis of rolle's theorem on the given interval . then find all the numbers c that satisfy the conclusion of rolle's theorem.

f(x)=sin2piex [-1,1]

i found the derivative cos 2pie x, but what do i do, and what does the theorem mean when f is differentiable on the open interval (a,b)

2. Mar 30, 2007

### afcwestwarrior

what do i do

3. Mar 31, 2007

### HallsofIvy

Staff Emeritus
First you go back and read the statement of Rolle's theorem? You are asked to "verify that the 3 hypothesis of rolle's theorem [are true] on the given interval". What are the 3 hypotheses? Being differentiable on the interior of the interval is one of them.

You are also asked to "find all the numbers c that satisfy the conclusion of rolle's theorem." Okay, what is the conclusion of Rolle's theorem?

4. Mar 31, 2007

### afcwestwarrior

well all these are true, so how do u find all numbers c

5. Mar 31, 2007

### f(x)

$f'(c)=0$

10 chars....

6. Apr 1, 2007

### HallsofIvy

Staff Emeritus
Again, what is the conclusion of Rolle's theorem?

7. Apr 1, 2007

### Gib Z

No The derivative of $\sin (2\pi x )$ is not that. Using the chain rule it is $2\pi \cos (2\pi x)$