Prove 1<a<2 ? Please help

**jess0517** · July 12th 2010, 04:46 PM

Hey Forum!
So i stumbled upon this question and im having difficulty proving it. =/
Any help would be appricited.

**Also sprach Zarathustra** · July 12th 2010, 05:05 PM

n/{1/a+1/b}<=sqrt{ab}<={a+b}/2

**jess0517** · July 12th 2010, 05:07 PM

Originally Posted by Also sprach Zarathustra

n/{1/a+1/b}<=sqrt{ab}<={a+b}/2

Im confused... how does that prove it?

**chiph588@** · July 12th 2010, 08:17 PM

Originally Posted by jess0517

Hey Forum!
So i stumbled upon this question and im having difficulty proving it. =/
Any help would be appricited.

Try inducting on $n$ for both inequalities.

**mr fantastic** · July 14th 2010, 02:27 AM

Thread closed due to this member deleting questions after getting help.

Thread: Prove 1<a<2 ? Please help