MathDB
an ineq with 2 variables

Source: Lithuania NMO,2010

March 11, 2012
inequalitiesinequalities proposed

Problem Statement

Let a,ba,b be real numbers. Prove the inequality 2(a4+a2b2+b4)3(a3b+ab3). 2(a^4+a^2b^2+b^4)\ge 3(a^3b+ab^3).