1 . 从椭圆
外一点
向椭圆引两条切线,切点分别为
,则直线
称作点
关于椭圆
的极线,其方程为
.现有如图所示的两个椭圆
,离心率分别为
,
内含于
,椭圆
上的任意一点
关于
的极线为
,若原点
到直线
的距离为1,则
的最大值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbec8b46231e412ddce55cc96634e182.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a9656735f55e5de465e5667ba578d4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21e9feabc99f62ee569b460e61526e2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f994a876391534efe497dc115a53e3fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/258cf8add2153a26a14de03c12b43d74.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2 . 几何学中,把满足某些特定条件的曲线组成的集合叫做曲线族.点
是椭圆族
上任意一点,如图所示,椭圆族T的元素满足以下条件:①长轴长为4;②一个焦点为原点
;③过定点
,则
的最大值是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/23/147498f7-00dd-4321-8dc4-6a9dad8743a4.png?resizew=187)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6e298293515d3c5d8343b668fe8541d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45e51a1df6628da1a46027c97d5beec2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/23/147498f7-00dd-4321-8dc4-6a9dad8743a4.png?resizew=187)
A.5 | B.7 | C.9 | D.11 |
您最近一年使用:0次
2022-11-19更新
|
465次组卷
|
3卷引用:重庆市第一中学校2023届高三上学期期中数学试题