INEQUALITY'S BLOG

November 22, 2010

Problem 69: van khea

Filed under: Uncategorized — KKKVVV @ 2:37 pm

Let a, b, c>0. Prove that:
3(a^4+b^4+c^4)+a^2b^2+b^2c^2+c^2a^2\geq 4(a^3b+bc^3+c^3a)

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