olymmath

BALKAN 2008 Problem 2

  • Paper

Does there exist a sequence a1,a2,…,an,…a_{1}, a_{2}, \ldots, a_{n}, \ldots of positive real numbers satisfying both of the following conditions: (i) ∑i=1nai≤n2\sum_{i=1}^{n} a_{i} \leq n^{2}, for every positive integer nn; (ii) ∑i=1n1ai≤2008\sum_{i=1}^{n} \frac{1}{a_{i}} \leq 2008, for every positive integer nn ?

Dataset text NuminaMath olympiads. Quoted with source.

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