如何证明焦点弦与椭圆内切圆相切时三角形面积最大（见补充）？ 知乎 Sketch Coloring Page

如何证明焦点弦与椭圆内切圆相切时三角形面积最大（见补充）？ 知乎 Template

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tomski如何证明焦点弦与椭圆内切圆相切时三角形面积最大（见补充）？ 知乎 coloring

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