# Math Help - Prove 1<a<2 ? Please help

1. ## Prove 1<a<2 ? Please help

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

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

3. Originally Posted by Also sprach Zarathustra
n/{1/a+1/b}<=sqrt{ab}<={a+b}/2
Im confused... how does that prove it?

4. 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.

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