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MathNet 2023-part-05 — 191 problems (EN–VI) Question 119

Math Olympiad Vault · MathNet 2023-part-05 — 191 problems (EN–VI)

Question 119

Fix an integer $n \ge 2$ and let $a_1, a_2, \dots, a_n$ be real numbers in the closed interval $[1, 2024]$. Prove that
$$
\sum_{i=1}^{n} \frac{1}{a_i} (a_1 + a_2 + \dots + a_i) \gt \frac{1}{44} n(n + 33).
$$