prove that with a+b+c+d=4 then a/(1+b^2c)+b/(1+c^2d)+c/(1+d^2a)+d/(1+a^2d)>=2
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prove that with a+b+c+d=4 then a/(1+b^2c)+b/(1+c^2d)+c/(1+d^2a)+d/(1+a^2d)>=2
I wasn't able to parse your question, but the HE.NET team is hard at work making me smarter.