for positive real numbers. The minimum value was found to be 3.
Problem 1 was criticized for being perhaps too simple for an international olympiad, acting more as a "points booster" than a differentiator for top talent. Comentarii JBMO 2015
For further analysis, you can explore the full JBMO 2015 solutions and commentaries provided by the Viitori Olimpici platform. JBMO 2015 Problems and Solutions | PDF | Mathematics for positive real numbers