INEQUALITY'S BLOG

November 22, 2010

Problem 70: van khea

Filed under: the new math — KKKVVV @ 2:40 pm

Prove that for all a, b, c\geq 0 we have:
a^4+b^4+c^4+(a^2+b^2+c^2)^2\geq 4(a^3b+b^3c+c^3a)

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