悠闲数学娱乐论坛(第3版)»论坛 › 数学区 › 初等数学讨论 › 四边形求(a^2-b^2)/(c^2-d^2)的范围

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[几何] 四边形求(a^2-b^2)/(c^2-d^2)的范围

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tommywong Post time 2014-12-28 09:36 |Read mode

现充已死，エロ当立。
维基用户页：https://zh.wikipedia.org/wiki/User:Tttfffkkk
Notable algebra methods：https://artofproblemsolving.com/community/c728438
《方幂和及其推广和式》数学学习与研究2016.

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Author| tommywong Post time 2014-12-28 20:57

有了有了有了有了有了有了有了有了有了有了有了有了有了......
mathchina.com/bbs/forum.php?mod=viewthread&tid=26530

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