名校
解题方法
1 . 已知椭圆
,其右焦点为
,点M在圆
上但不在
轴上,过点
作圆的切线交椭圆于
,
两点,当点
在
轴上时,
.
(1)求椭圆
的标准方程;
(2)当点
在圆上运动时,试探究
周长的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ce176fdfbb44b8459f441a8d805013f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef74c4299221a967507c6a179337581a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49c7e3b6c9b4c7c09f0246a6e05c7e1b.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91a9bf6bda9363dbef5f6ff4bf6a5edf.png)
您最近一年使用:0次
2022-03-30更新
|
3298次组卷
|
9卷引用:广东省揭阳市揭东区2022-2023学年高二上学期期末数学试题
广东省揭阳市揭东区2022-2023学年高二上学期期末数学试题广东省2022届高三一模数学试题(已下线)专题二十三 椭圆与方程广东省广州市番禺区2021-2022学年高二下学期期中数学试题(已下线)必刷卷03 (理)-2022年高考数学考前信息必刷卷(全国乙卷)新疆实验中学2022-2023学年高二上学期期中考试数学试题(已下线)专题38 圆锥曲线中的圆问题-1河北省2022届高考临考信息(预测演练)数学试题(已下线)广东省2022届高三一模数学试题变式题17-22
名校
2 . 已知椭圆
的长轴长为
,离心率为
.
![](https://img.xkw.com/dksih/QBM/2017/2/21/1628719059648512/1628920019746816/STEM/8fba4f96-01f4-426a-9c4e-840b3319cfb8.png?resizew=221)
(1)求椭圆
的方程;
(2)
为椭圆
上任意一点,过点
的直线
交椭圆
于
两点,射线
交椭圆
于点
(
为坐标原点).①是否存在常数
,使得
恒成立?若存在,求出
的值,否则,请说明理由;②求
面积的最大值,并写出取最大值时
与
的等量关系式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dae13b2a96f91ab64fb4948de2b0ae10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f78c38805c09dcfbcc42103308975a74.png)
![](https://img.xkw.com/dksih/QBM/2017/2/21/1628719059648512/1628920019746816/STEM/8fba4f96-01f4-426a-9c4e-840b3319cfb8.png?resizew=221)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7895aece9dd5a90424879ea9184037a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91570f6a5d4fdf7c757212083f2f06af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ae1567d8f98fabc1a3948f8602cc5e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b73be30f639b301cf797d6e8d04a568d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/316ecb1589c3cc179e2f62507020771e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/186354626d5a1d13b88dfb4df916947b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c49a88fd5ecdd45767803fdaddd0832.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab52437119a48617266b336c1d2d5a50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
3 . 椭圆E:
+
=1(a>b>0)的左焦点为F1,右焦点为F2,离心率e=
.过F1的直线交椭圆于A,B两点,且△ABF2的周长为8.
(1)求椭圆E的方程.
(2)在椭圆E上,是否存在点M(m,n)使得直线l:mx+ny=1与圆O:x2+y2=1相交于不同的两点P,Q,且△POQ的面积最大?若存在,求出点M的坐标及相对应的△POQ的面积;若不存在,请说明理由.
![](https://img.xkw.com/dksih/QBM/2016/3/17/1572544751599616/1572544757235712/STEM/b736922adb854087b12583853ceba036.png)
![](https://img.xkw.com/dksih/QBM/2016/3/17/1572544751599616/1572544757235712/STEM/d7337e1193d44654a9dbe8d33f8bcf05.png)
![](https://img.xkw.com/dksih/QBM/2016/3/17/1572544751599616/1572544757235712/STEM/fa76b58355c14591935653eb0f96639b.png)
(1)求椭圆E的方程.
(2)在椭圆E上,是否存在点M(m,n)使得直线l:mx+ny=1与圆O:x2+y2=1相交于不同的两点P,Q,且△POQ的面积最大?若存在,求出点M的坐标及相对应的△POQ的面积;若不存在,请说明理由.
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