与椭圆右、下顶点连线平行的直线交椭圆于两点，这两点到原点的距离平方和为何为定值？ 知乎 Sketch Coloring Page

与椭圆右、下顶点连线平行的直线交椭圆于两点，这两点到原点的距离平方和为何为定值？ 知乎 Template

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21． 椭圆有两顶点AB10过其焦点F01的直线l与椭圆交于CD两点并与x轴交于点P．直线AC与直线BD交于点Q． I sketch template

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文已知椭圆的左焦点为右顶点为点在椭圆上且轴 直线交轴于点．若则椭圆的离心率是 A． B． C． D．理已知是椭圆的 sketch template

已知椭圆 =1直线ly=x T交椭圆于AB两点 OAB的面积为S的奇偶性为 A．奇函数 B．偶函数 C．不是奇函数也不是偶函数 D sketch template

椭圆=1的左右焦点为F1F2过F1的直线l与椭圆相交于AB两点．1若∠AF1F2=60°且点A在以F1F2为直径的圆上求椭圆的 sketch template

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