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回复 kuing 这个恒等式这么妙呀! 好像一个什么条件不等式的证明, 就是通过一个恒等式(配方)就立刻证 ... 其妙 发表于 2014-11-17 23:15
$\LaTeX$ formula tutorial Reply post To last page
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2025-7-15 13:57 GMT+8
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