已知椭圆
的左、右焦点分别为
、
,半焦距为
,
是椭圆上异于左、右顶点的任意一点,若存在以
为半径的圆内切于
(
的面积满足
),则椭圆的离心率的取值范围是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dd54b9df3402ad91e2d34c40efe0c7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33d776753746914c2410a3946c357f35.png)
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2021·陕西西安·一模 查看更多[4]
陕西省西安市周至县2020-2021学年高三一模文科数学试题陕西省西安市周至县2020-2021学年高三一模理科数学试题(已下线)考点巩固卷20 椭圆方程及其性质(十大考点)(已下线)模块二 专题6 离心率的求解和范围问题 期末终极研习室高二人教A版
更新时间:2023-08-09 07:05:25
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【推荐1】若椭圆长轴、短轴、焦距的长度之和等于8,则长半轴的取值范围是______ ,当长半轴取得最小值时,椭圆的离心率等于______ .
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【推荐2】已知点
是椭圆
的左焦点,过原点作直线
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两点,
分别是
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【推荐1】已知椭圆
:
,
,
为其左、右焦点,
为椭圆
上任一点,
的重心为G,I是内心,且有
(其中
为实数),椭圆
的离心率![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47ce2b47812fce4b17fd813d0e4cce21.png)
_____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
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【推荐2】如图,已知
,
分别是椭圆
的左、右焦点,M,N为椭圆上两点,满足
,且
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