Just need to be sure on this : , making the substitution I reached that the integral is worth .

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- July 18th 2008, 12:45 PMarbolisIntegral, is my result correct?
Just need to be sure on this : , making the substitution I reached that the integral is worth .

- July 18th 2008, 01:02 PMMathstud28
- July 18th 2008, 01:07 PMarbolis
You're right. I think I know where is my error...

- July 18th 2008, 01:17 PMMathstud28
- July 18th 2008, 01:27 PMarbolis
You're right. I think I know where is my error... Hmm no...

Let me show you what I did : Let , .

So the integral becomes .

Now let .

We know that and that . Furthermore, and .

Therefore we can rewrite the integral as , and from it I reached the result I gave in my first post. I thought I might have made an error for , but I don't think so. Can you help me finding where is my error? - July 18th 2008, 01:31 PMMathstud28
- July 18th 2008, 01:36 PMarbolisQuote:

I think your error is in simplifying that integral at the end

Finally I got the answer . I hope this time it's correct. - July 18th 2008, 01:39 PMMathstud28
- July 18th 2008, 01:55 PMarbolis
Now I got that it's equal to . Now I must calculate this.

- July 18th 2008, 02:00 PMMathstud28
- July 18th 2008, 02:24 PMarbolis
Before I read

Quote: - July 18th 2008, 03:04 PMMathstud28