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.

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- October 11th 2012, 07:31 AMgeniusgarvilonce 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.

- October 11th 2012, 08:01 AMPlatoRe: once more help me out