MathDB
0 ≤ a ≤ b ≤ c product inequality

Source: Italy TST 2001

November 21, 2010
inequalitiesinequalities proposedalgebra

Problem Statement

Let 0abc0\le a\le b\le c be real numbers. Prove that (a+3b)(b+4c)(c+2a)60abc(a+3b)(b+4c)(c+2a)\ge 60abc