Problem A. 534. (April 2011)
A. 534. The sides of a triangle are a, b and c, the lengths of the corresponding medians are sa, sb and sc, respectively. Prove that .
(Proposed by: Donát Nagy, Szeged)
Deadline expired on May 10, 2011.
4 students sent a solution. 5 points: Backhausz Tibor, Nagy 235 János, Nagy 648 Donát. 1 point: 1 student.