Let
and
be positive real numbers satisfying
and
Prove that
Proposed by Titu Andrescu, Saudi Arabia
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Let $a,b$ and $c$ be positive real numbers satisfying $\min(a+b,b+c,c+a) > \sqrt{2}$ and $a^2+b^2+c^2=3.$ Prove that
$$\frac{a}{(b+c-a)^2} + \frac{b}{(c+a-b)^2} + \frac{c}{(a+b-c)^2} \geq \frac{3}{(abc)^2}.$$
Proposed by Titu Andrescu, Saudi Arabia