olymmath

CMO 2012 Problem 1

  • Paper

Let x,yx, y and zz be positive real numbers. Show that x2+xy2+xyz2≥4xyz−4x^{2}+x y^{2}+x y z^{2} \geq 4 x y z-4.

Dataset text NuminaMath olympiads. Quoted with source.

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