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MathNet 2020 — Math Olympiad Vault — Part 01 Question 38

Math Olympiad Vault · MathNet 2020 — Math Olympiad Vault — Part 01

Question 38

Determine, with proof, whether or not there exist distinct positive integers $a_{1}, a_{2}, \ldots, a_{n}$ such that
$$
\frac{1}{a_{1}} + \frac{1}{a_{2}} + \cdots + \frac{1}{a_{n}} = 2019.
$$