设
,
分别是椭圆
的左、右焦点,过
的直线交椭圆于
,
两点,且
,
,则椭圆
的离心率为_________
![](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/e7e5578ca83f5bd5c285994061b9c015.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/164affaa83e5d9e38d413b4750846fde.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27f3fac74baf7f6eb69dabf63f54740a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
2020高三·全国·专题练习 查看更多[5]
(已下线)考点42 椭圆(讲解)-2021年高考数学复习一轮复习笔记(已下线)专题06 离心率-2021年高考数学二轮复习解题技巧汇总(新高考地区专用)海南省海口市第一中学2021届高三9月月考数学试题江苏省无锡市第一中学2023-2024学年高二上学期12月质量检测数学试卷(已下线)专题6 圆锥曲线焦半径公式(高三压轴小题大全)【练】
更新时间:2020-08-18 14:32:19
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【推荐1】已知椭圆
的左,右焦点分别为
,过点
且垂直于
轴的直线与椭圆交于
两点,
分别交
轴于
两点,
的周长为6,过
作
外角平分线的垂线与直线
交于点
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7ce9da1390cca752cd508e1f4190df6.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/013fcf67631b4a27d4eaee7957b29ac5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddbaa023d0248161917794c5592fd3a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
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【推荐2】设
分别为椭圆
的左、右焦点,A为短轴一个端点,直线
交椭圆C于另一点M,且
,则椭圆C的离心率是____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cabea664e61863b3b3279dbce607924e.png)
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【推荐3】已知椭圆
:
的左、右焦点分别为
,
,以
为圆心,
为半径的圆与
轴交于
,
两点(
,
两点均在
外),连接
,与
交于点P,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef3886203b5afb7dc864b6fca1fbe5c7.png)
________ ;椭圆
的离心率为_________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e19960ba707a6b1d55460c6a5855dd3.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/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cdfc6a59392d1ac3cd89ddc0308864c.png)
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【推荐1】已知椭圆
的左、右焦点分别是
,
是椭圆上顶点,过点
作
,垂足为
,若
,则椭圆
的离心率为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/851a5d6ec23256f9b4a9e98aa92945fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
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【推荐2】已知椭圆
的左顶点为
,上顶点为
为坐标原点,椭圆上的点
分别在第一、二象限内,若
与
的面积相等,且
,则
的离心率为__________ .
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