Solution

I really don't understand, why should I divide the answer by 8?..

UPD: Nevermind, got it.

*Edited by author 02.05.2014 17:23*

Re: Solution

In problem you are given full axis and if you don't want divide answer by 8, you must divide given a and b by 2 before counting integral

*Edited by author 06.10.2014 02:02*

Re: Solution

*Edited by author 06.10.2014 02:02*

Re: Solution

BinaryMind, no, it's because your a and b is full lenght and width of ellipse, but you need half of a and half of b.