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original poster: 走走看看

[几何] 证明椭圆与直线交点唯一

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其妙 posted 2018-2-22 23:53

回复其妙

果真很妙！
我还以为在吹牛呢。
走走看看发表于 2018-2-20 19:55

我也差点就吹牛了

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isee posted 2018-3-1 10:14

回复 19# 其妙

这种的证法，我在俄罗斯平面几何习题集里见到过……

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其妙 posted 2018-3-3 10:18

回复 22# isee
不好意思，我没看见过

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