12-13高二上·吉林松原·期末
名校
解题方法
1 . 已知椭圆
及直线
.
(1)当
为何值时,直线与椭圆有公共点?
(2)若直线被椭圆截得的弦长为
,求直线的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2db3534aaf21bbc27448be9ee90a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54479885d4ab2f717d2e97718da04b43.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)若直线被椭圆截得的弦长为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2858f41dc806e4a944c7cc58a46afff.png)
您最近一年使用:0次
2016-12-02更新
|
2044次组卷
|
6卷引用:2012-2013学年吉林省扶余一中高二上学期期末考试文科数学试卷
10-11高二下·山东济宁·期末
名校
2 . .已知椭圆
离心率
,焦点到椭圆上
的点的最短距离为
.
(1)求椭圆的标准方程.
(2)设直线
与椭圆交与M,N两点,当
时,求直线
的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ec56b59d6f2654570c2b5c4fd13a05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5de85df85401e7e8da683ea4a784963c.png)
的点的最短距离为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bff7f459393e7acdc37b34374864257.png)
(1)求椭圆的标准方程.
(2)设直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acd55f837e9c4e6bba1163ef13edd09b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f20c574dd96a802f37c088ed2ca9b724.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
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3 . 如图,已知椭圆
焦点为
,双曲线
,设
是双曲线
上异于顶点的任一点,直线
与椭圆的交点分别为
.
![](https://img.xkw.com/dksih/QBM/2012/2/4/1570715413454848/1570715418918912/STEM/e1e569dd-27db-4f6f-b761-701c3ec9c68d.png?resizew=196)
(1) 设直线
的斜率分别为
和
,求
的值;
(2)是否存在常数
,使得
恒成立?若存在,试求出
的值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6892c5b9920d1b817fe27d6c2ce6a566.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/197c241d356926f79708a700e3629b86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eebc5d2fa9efb65f76264ab61d4c6f38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fde444b5c58944501ef2bc30df794e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2cc024d73ce89d6a810271c5c614527.png)
![](https://img.xkw.com/dksih/QBM/2012/2/4/1570715413454848/1570715418918912/STEM/e1e569dd-27db-4f6f-b761-701c3ec9c68d.png?resizew=196)
(1) 设直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fde444b5c58944501ef2bc30df794e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f375dc5addedc5f9fbb72d566939c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/731f980ccb6f902d460d0ea2920bfe2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4757181824e15e0f21e5bdd55448783.png)
(2)是否存在常数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/174fbf6858730b889380c99f1bb1d532.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
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10-11高二下·吉林长春·期末
解题方法
4 . 已知
是椭圆
的左、右焦点,过点
作倾斜角为
的直线
交椭圆于
两点,
.
(1)求椭圆的离心率;
(2)若
,求椭圆的标准方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/475a3fdc7b27d5ffa8c864dc478903d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48da128547c4cf9745e8e4b99988a3db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af9955b5aebb73cd84447e8541f901ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a99ab29029a0a2604ba8fd5e9f238709.png)
(1)求椭圆的离心率;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5f23420529a6a808d22d454e87a6194.png)
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