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[不等式] 如何证明四面体的陪位重心到各侧面的距离之和最小

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lihpb posted 2024-8-10 16:21 |Read mode
陪位重心即重心的等角共轭点

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爪机专用 posted 2024-8-10 17:25
Last edited by 爪机专用 2024-8-10 18:27到各侧面的距离之和最小的点应该是:最大的面所对的顶点。

你可以用一个直角四面体来验证一下,看看是倍位重心处小,还是直角顶点处小
I am majia of kuing

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original poster lihpb posted 2024-8-10 20:58 from mobile
顶点和侧面上的点不算,只考虑四面体内的点

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爪机专用 posted 2024-8-10 22:37
lihpb 发表于 2024-8-10 20:58
顶点和侧面上的点不算,只考虑四面体内的点
……
如果某个顶点处的值小于倍位重心处,那就算是要求内部点,我也大可以让内点非常接近那个顶点,也肯定比倍位重心的小。
I am majia of kuing

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