Inequality 184

by nicusorz, Jan 16, 2013, 3:18 PM

Let $ x,y,z> 0,n\in N $.Prove that .
$ x^{3n}-x^{2n}y^{n}+x^{n}y^{2n}-y^{3n}\geq (x^{3}-x^{2}y+xy^{2}-y^{3})^{n} $

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Inequality 184
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