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Friday, March 5, 2010

Well...

睇黎我要背鬼左呢兩條 inequality 佢=.=,起碼要由右手邊 sense 到左手邊舊野。
  • $  a^3+b^3+c^3+3abc \geq a^2 b+a^2 c+b^2 a+b^2 c+c^2 a+c^2 b$.
  • $  a^4+b^4+c^4+abc(a+b+c) \geq a^3 b+a^3 c+b^3 a+b^3 c+c^3 a+c^3 b$.

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