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MathNet 2022-part-05 — 197 problems (EN–VI) Question 182

Math Olympiad Vault · MathNet 2022-part-05 — 197 problems (EN–VI)

Question 182

For positive real numbers $a$, $b$, $c$, which satisfy the condition $ab + bc + ca = 1$, prove the following inequality:
$$
\left(\sqrt{bc} + \frac{1}{2a + \sqrt{bc}}\right) \cdot \left(\sqrt{ca} + \frac{1}{2b + \sqrt{ca}}\right) \cdot \left(\sqrt{ab} + \frac{1}{2c + \sqrt{ab}}\right) \ge 8abc.
$$