解题方法
1 . 已知椭圆C的左右焦点分别为F1、F2,过点F2的直线与椭圆C交于点A,B,若|AF1|=|AB|=5,|F1B|=6,则椭圆C的离心率为_____ .
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解题方法
2 . 已知离心率为
的椭圆
的左、右顶点分别为
,
,点
为该椭圆上一点,且
在第一象限,直线
与直线
交于点
,直线
与直线
交于点
,若
,则直线
的斜率为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24c14ff9b66f21c05e52dc3c8908c2df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c4681550b280f48da99c43877e011e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f23d29646155e27b172ecdf263e2d702.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f23d29646155e27b172ecdf263e2d702.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c7ea848c4d5235d4454a6390826d798.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
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3 . 设圆锥曲线Γ的两个焦点分别为F1,F2.若曲线Γ上存在点P满足|PF1|∶|F1F2|∶|PF2|=4∶3∶2,则曲线Γ的离心率等于__________ .
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2017-07-23更新
|
873次组卷
|
8卷引用:第2章 圆锥曲线【单元提升卷】-【满分全攻略】2022-2023学年高二数学下学期核心考点+重难点讲练与测试(沪教版2020选修一+选修二)
(已下线)第2章 圆锥曲线【单元提升卷】-【满分全攻略】2022-2023学年高二数学下学期核心考点+重难点讲练与测试(沪教版2020选修一+选修二)沪教版(2020) 选修第一册 精准辅导 第2章 单元测试卷广西桂林市逸仙中学2022-2023学年高二上学期11月期中数学试题福建省2016届高三毕业班总复习(圆锥曲线)单元过关形成性测试卷数学(理)试题(已下线)实战演练10.3-2018年高考艺考步步高系列数学陕西省西安中学2021届高三下学期第九次模拟考试文科数学试题(已下线)知识点:双曲线的离心率 易错点 忽略了给定条件对e范围的限定(已下线)大招29离心率几何化模型
4 . 已知椭圆
:
的左、右焦点分别为
,
,离心率为
,过
且垂直于
轴的直线被椭圆
截得的线段长为1.
![](https://img.xkw.com/dksih/QBM/2020/1/31/2389062106529792/2389183410331648/STEM/5497be016e3f456d92f09b074dd7f0f9.png?resizew=216)
(1)求椭圆的标准方程;
(2)设
为椭圆上一点,若
,求
的面积;
(3)若
为钝角,求
点横坐标的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](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/860884c0017c8bceb5b0edff796c144f.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://img.xkw.com/dksih/QBM/2020/1/31/2389062106529792/2389183410331648/STEM/5497be016e3f456d92f09b074dd7f0f9.png?resizew=216)
(1)求椭圆的标准方程;
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0b631d3f632c5a746410e630febdabf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33d776753746914c2410a3946c357f35.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94fe48bf7af022ecbbe13833fdcc2c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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5 . 若一个椭圆长轴的长度、短轴的长度和焦距成等差数列,则该椭圆焦距与长轴之比的比值是______ .
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解题方法
6 . 已知点A为椭圆
上一点,
分别为椭圆的左、右焦点.
(1)求椭圆
的离心率;
(2)若点A的横坐标为2,求
的长.
(3)设
的上、下顶点分别为
,点
为椭圆
上一点,记
的面积为
的面积为
,若
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b518294f0ce7451906972f251dffa622.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b518294f0ce7451906972f251dffa622.png)
(2)若点A的横坐标为2,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7eb625a01549a61f59a73ff592d1a8a5.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b94469fd19f40116e2dec334919d6586.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/237c115d5b39d761e1cbcae031070b70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b518294f0ce7451906972f251dffa622.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47444b5fbc4252516d54263062e47c81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c82176d10d662f388b77ea553f0752d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f9a70f972a02c8645f2e25110f043b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85a82596d3e0eea2ea14448e3ede29c2.png)
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