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MathNet 2019-part-01 — 184 problems (EN–VI) Question 70

Math Olympiad Vault · MathNet 2019-part-01 — 184 problems (EN–VI)

Question 70

Prove that for an arbitrary positive integer $n$ the following inequality holds:
$$
\frac{1}{1^2 + 2019} + \frac{1}{2^2 + 2019} + \dots + \frac{1}{n^2 + 2019} \lt \frac{1}{22}.
$$