Re: Hard problem
- From: "Pubkeybreaker" <Robert_silverman@xxxxxxxxxxxx>
- Date: 1 Dec 2005 14:08:08 -0800
Peper wrote:
> three _positive_ real numbers a,b,c with
> ab + bc + ca = 3
>
> prove that:
> a^3 + b^3 + c^3 + 6abc >= 9
>
> Any hints how to do that?
>
A hint:
Lagrange Multipliers. The answer falls right out.
.
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