名校
解题方法
1 . 已知椭圆
与
轴,
轴的正半轴分别交于A,B两点,原点O到直线AB的距离为
该椭圆的离心率为
.
(1)求椭圆的方程
(2)是否存在过点P
的直线
与椭圆交于M,N两个不同的点,使
成立?若存在,求出
的方程;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48da128547c4cf9745e8e4b99988a3db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ea6e972ea53db1c69eb100623f22a53.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
(1)求椭圆的方程
(2)是否存在过点P
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f5ffdaf0ff52182270424727e23354.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cc388f35a38f18916f3e09e285fc70f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
您最近一年使用:0次
2016-12-04更新
|
344次组卷
|
3卷引用:2015届内蒙古一机一中高三12月月考文科数学试卷
2 . 已知椭圆C:
的离心率为
,且C上任意一点到两个焦点的距离之和都为4.
(Ⅰ)求椭圆C的方程;
![](https://img.xkw.com/dksih/QBM/2015/5/4/1572093589946368/1572093596106752/STEM/48f8803d5b3f47909c09ebc71eacd4dd.png)
(Ⅱ)设直线
与椭圆交于P、Q,O为坐标原点,若
,求证
为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ec56b59d6f2654570c2b5c4fd13a05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
(Ⅰ)求椭圆C的方程;
![](https://img.xkw.com/dksih/QBM/2015/5/4/1572093589946368/1572093596106752/STEM/48f8803d5b3f47909c09ebc71eacd4dd.png)
(Ⅱ)设直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77ec9ac3c9a223321dcba6e5df6d4328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/470b43996302afddc155f87e63a96775.png)
您最近一年使用:0次
2014·内蒙古鄂尔多斯·一模
3 . 已知椭圆
的离心率为
,且过点![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e38398209c6e596145044d5afdea2e80.png)
(Ⅰ)求椭圆
的方程;
(Ⅱ)设直线
与圆
相切于点
,且
与椭圆
只有一个公共点
.
①求证:
;
②当
为何值时,
取得最大值?并求出最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7e5578ca83f5bd5c285994061b9c015.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e38398209c6e596145044d5afdea2e80.png)
(Ⅰ)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(Ⅱ)设直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c287201dc8f4b7e1a8dd41920654656.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bf2ccd1d1456c4f637187fb9c5f2f41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
①求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29015bb9dcdb4e618cf00d88617ef46a.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4dfec890cdfdda355e19463f3be813.png)
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2012·内蒙古呼伦贝尔·模拟预测
解题方法
4 . 已知椭圆
的左、右焦点分别为
离心率
,点
在且椭圆
上,
(1)求椭圆
的方程;
(2)设过点
且不与坐标轴垂直的直线交椭圆
于
两点,线段
的垂直平分线与
轴交于点
,求点
横坐标的取值范围.
(3)试用
表示
的面积,并求
面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cae310fcc72d8c05d006e77f67707f52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06adf1e9ff51283187b5e300f31f806a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/075ba8c6fb5ef7288cd3fed425c8e69e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bdfbae913ff7ff8caaefcaacf8c20ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(2)设过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e52586ca2a3b783bc8092415e2d4bf6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/979a5007410582aea8ec4b983fe5441f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
(3)试用
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b3b785ebbf5889849e872f461669f71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b3b785ebbf5889849e872f461669f71.png)
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2011·内蒙古包头·一模
解题方法
5 . 已知方向向量为
的直线
过点
和椭圆
的右焦点,且椭圆的离心率为
.
(1)求椭圆C的方程;
(2)若已知点
,点
是椭圆
上不重合的两点,且
,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c21fe18fbf4b2041f087ef856070a8a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81fd4d9221d9d1d621faf96b9baa293d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df1dad0690278e2e7c069a27612b7636.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1174142f3bba761585b6bc2653009b36.png)
(1)求椭圆C的方程;
(2)若已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd304fccc004e57c271f477150f23668.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7c4d05b3d4bf54ffdc581a33bc39cfc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
您最近一年使用:0次