MathDB
An inequality

Source: Indian RMO 1994 Problem 8

October 25, 2005
inequalities

Problem Statement

If a,b,ca,b,c are positive real numbers such that a+b+c=1a+b+c = 1, prove that (1+a)(1+b)(1+c)8(1a)(1b)(1c). (1+a)(1+b)(1+c) \geq 8 (1-a)(1-b)(1-c) .