1. The problem statement, all variables and given/known data Hi, i'm trying to solve this problem: http://img4.imageshack.us/img4/3876/53065718.jpg [Broken].[/URL] 3. The attempt at a solution I have shown it for n=2 and n=3 then I was going to use induction to prove it for all n, but I can't seem to find a way to do it. Please help! Thanks.