Thread: once more help me out

if a,b,c,d are greater than 0, than prove that a/(b+c) + b/(c+d) + c/(a+d) d/(a+b) is always greater than or equal to 2.

Originally Posted by geniusgarvil

if a,b,c,d are greater than 0, than prove that a/(b+c) + b/(c+d) + c/(a+d) d/(a+b) is always greater than or equal to 2.

Please show some of your own effort on this problem.