MathDB
0<a,b<1<c if a,b,c>0 with abc=1, a+b+c>1/a+1/b+1/c

Source: 1995 Swedish Mathematical Competition p4

April 2, 2021
inequalitiesalgebraSumProduct

Problem Statement

The product of three positive numbers is 11 and their sum is greater than the sum of their inverses. Prove that one of these numbers is greater than 11, while the other two are smaller than 11.