Find all triplets satisfying to inequalities.
Source: All-Russian Olympiad 2008 10.5
June 14, 2008
algebrasystem of equationsalgebra proposed
Problem Statement
Determine all triplets of real numbers satisfying 1\plus{}x^4\leq 2(y\minus{}z)^2, 1\plus{}y^4\leq 2(x\minus{}z)^2, 1\plus{}z^4\leq 2(x\minus{}y)^2.