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MathNet 2026 — Part 04 Question 97

Math Olympiad Vault · MathNet 2026 — Part 04

Question 97

Let $a$, $b$, $c$ be strictly positive reals. Show that $$
\frac{a}{b c}+\frac{b}{a c}+\frac{c}{a b} \geqslant \frac{2}{a}+\frac{2}{b}-\frac{2}{c} .
$$ Attention, there is a "minus" in the right member!