1 . 椭圆
(![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fabaacba0fd7621ce95656b987fe7331.png)
)的左、右焦点分别是
,过
作倾斜角为
的直线与椭圆的一个交点为
,若
垂直于
轴,则椭圆的离心率为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7aea48c44781a844b5c19191f70f61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fabaacba0fd7621ce95656b987fe7331.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/229d55eeae0ce82c467bd1e5686d8ea1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/504b6ba4e1aa49d4ffac24851cb2e31e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a21e7c3cd84ab1feddfbe9e6f5c11ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b67528f875a6d4bac8bbf784f7b66a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2016-12-04更新
|
314次组卷
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3卷引用:江苏省扬州市宝应县曹甸高级中学2023-2024学年高二上学期10月月考数学试题
2 . 椭圆
左、右焦点分别为
若椭圆
上存在点
,使得
为椭圆的离心率,则椭圆
的离心率的取值范围为_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46fc9f4c373e0c797ba9ba24d862ef99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/882651b776851f3f0665de12da6ed47d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efd86be78225ffedc348fc168513c418.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
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11-12高二上·江苏·期末
3 . 椭圆上的点到一条准线距离的最小值恰好等于该椭圆半焦距,则此椭圆的离心率是_______ .
您最近一年使用:0次
9-10高二下·江苏·期中
4 . 已知椭圆
的离心率为
,过右顶点
的直线
与椭圆
相交于
、
两点,且
.
(1)求椭圆
和直线
的方程;
(2)记曲线
在直线
下方的部分与线段AB所围成的平面区域(含边界)为
.若曲线
与
有公共点,试求实数
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/721b1cbdca09f348afe11195f0bd25fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1174142f3bba761585b6bc2653009b36.png)
![](https://img.xkw.com/dksih/QBM/2011/11/21/1570357662908416/1570357668421632/STEM/573b6cce04cd4d2883ce7f333841fb87.png?resizew=16)
![](https://img.xkw.com/dksih/QBM/2011/11/21/1570357662908416/1570357668421632/STEM/5c4773eaf4954d6d8d1da5376a1717e6.png?resizew=9)
![](https://img.xkw.com/dksih/QBM/2011/11/21/1570357662908416/1570357668421632/STEM/ac4754cb62bd4f6d96b8f7da837e77ba.png?resizew=16)
![](https://img.xkw.com/dksih/QBM/2011/11/21/1570357662908416/1570357668421632/STEM/573b6cce04cd4d2883ce7f333841fb87.png?resizew=16)
![](https://img.xkw.com/dksih/QBM/2011/11/21/1570357662908416/1570357668421632/STEM/c1759b60992a4383bf1a572648ed4fa5.png?resizew=16)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f44b2e6e76702e3ccba146dacb415871.png)
(1)求椭圆
![](https://img.xkw.com/dksih/QBM/2011/11/21/1570357662908416/1570357668421632/STEM/ac4754cb62bd4f6d96b8f7da837e77ba.png?resizew=16)
![](https://img.xkw.com/dksih/QBM/2011/11/21/1570357662908416/1570357668421632/STEM/5c4773eaf4954d6d8d1da5376a1717e6.png?resizew=9)
(2)记曲线
![](https://img.xkw.com/dksih/QBM/2011/11/21/1570357662908416/1570357668421632/STEM/ac4754cb62bd4f6d96b8f7da837e77ba.png?resizew=16)
![](https://img.xkw.com/dksih/QBM/2011/11/21/1570357662908416/1570357668421632/STEM/5c4773eaf4954d6d8d1da5376a1717e6.png?resizew=9)
![](https://img.xkw.com/dksih/QBM/2011/11/21/1570357662908416/1570357668421632/STEM/0da3e2258a5447f8a9c971ca3c95d03e.png?resizew=17)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bfc77b367563f3c86c3286526022422.png)
![](https://img.xkw.com/dksih/QBM/2011/11/21/1570357662908416/1570357668421632/STEM/0da3e2258a5447f8a9c971ca3c95d03e.png?resizew=17)
![](https://img.xkw.com/dksih/QBM/2011/11/21/1570357662908416/1570357668421632/STEM/8e6ebe6439ad4c62a5ceefb658c7b5b5.png?resizew=17)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/15/c0121f02-af43-47e5-be1a-35abe00ca957.png?resizew=196)
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解题方法
5 . 设椭圆C:
的上顶点为A,左、右焦点分别为
,连接
并延长交椭圆C于点P,若
,则该椭圆的离心率为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dd54b9df3402ad91e2d34c40efe0c7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40f98254a6193566587a70c7d95fdabf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cabea664e61863b3b3279dbce607924e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29b35d50730c973286dc99ed9405f6d4.png)
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