olymmath

JBMO-SL 2019 A7

Show that for any positive real numbers a,b,ca, b, c such that a+b+c=ab+bc+caa+b+c=a b+b c+c a, the following inequality holds

3+a3+123+b3+123+c3+123⩽2(a+b+c)3+\sqrt[3]{\frac{a^{3}+1}{2}}+\sqrt[3]{\frac{b^{3}+1}{2}}+\sqrt[3]{\frac{c^{3}+1}{2}} \leqslant 2(a+b+c)

Dataset text NuminaMath olympiads. Quoted with source.

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