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[不等式] 不等式

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链剑心 posted 2014-3-22 15:08 |Read mode
Last edited by 链剑心 2014-3-22 15:27$x,y,z$是自然数。
\[\sum\frac{x+1}{y}\]
也是。
求证:
\[\gcd(a,b,c)\leqslant\sqrt[3]{xy+yz+zx}\]

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