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[几何] 一道椭圆的斜率关系

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lemondian posted 2018-6-28 11:49 |Read mode

QQ截图20180628114350.jpg

请问：这道题的第2小问，除了常规的做法（设M，N的坐标，求直线MD，ND，再求P，Q坐标），有没有其它的做法？

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2025-6-9 00:30 GMT+8

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