由柯西不等式,
右邊的平方
因xyz=2
= xyz(x^2+y^2+z^2)(x+y+z)
由平均不等式,
由AG不等式,
由柯西不等式,
右邊的平方
因xyz=2
= xyz(x^2+y^2+z^2)(x+y+z)
由平均不等式,
由AG不等式,
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