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[不等式] 不等式

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血狼王 posted 2021-11-22 09:04 |Read mode
若有非负实数$x,y,z$满足$x^2+y^2+z^2+xyz=4.$
求证:
$$|x^2-2y-1|+|y^2-2z-1|+|z^2-2x-1|\geq 1+2\sqrt{3}.$$
血狼王者,格罗特克斯(Grotex)是也。
AOPS的id:Grotex

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