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MathNet 2017-part-06 — 176 problems (EN–VI) Question 87

Math Olympiad Vault · MathNet 2017-part-06 — 176 problems (EN–VI)

Question 87

Determine the maximum possible value of the expression
$$
27 a b c + a \sqrt{a^{2} + 2 b c} + b \sqrt{b^{2} + 2 c a} + c \sqrt{c^{2} + 2 a b}
$$
where $a, b, c$ are positive real numbers such that $a + b + c = \frac{1}{\sqrt{3}}$.