Prove that:

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- Aug 12th 2008, 06:02 AMOrtegaProve
Prove that:

- Aug 12th 2008, 06:52 AMCaptainBlack
- Aug 12th 2008, 06:54 AMOrtega
- Aug 12th 2008, 10:07 AMCaptainBlack
- Aug 12th 2008, 10:33 AMJaneBennet

- Aug 12th 2008, 11:41 AMOrtega
Thks Jane,this is what i look for.i saw the solution for the problem into the book,and they solve it complicated,frankly i didnt understand anything of their result.Your solution is very good and simple to understand it.

BRAVO.

*i hope that you understand me.