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original poster: 1+1=?

[几何] 椭圆中心张定角所对弦的包络一般是高次曲线

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lemondian posted 2025-5-9 17:04
kuing 发表于 2025-4-24 09:05
用之前这帖:forum.php?mod=redirect&goto=findpost&pid=25629&ptid=5228 的结论就可以了


再次回顾这个结论,仍没证出来。
麻烦kuing写写证明过程吧,谢谢了

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