已知中心在坐标原点、焦点在x轴上的椭圆,它的离心率为
,且与直线x+y-1=0相交于M、N两点,若以MN为直径的圆经过坐标原点,求椭圆的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
更新时间:2017-11-10 09:57:08
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【推荐1】已知椭圆![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a5bbb709522dba9425a6b45ee671298.png)
过点
,离心率为
.
(1)求椭圆
的方程;
(2)过点
作直线
,
与直线
和椭圆
分别交于两点
,
(
与
不重合).判断以
为直径的圆是否过定点,如果过定点,求出定点坐标;如果不过定点,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a5bbb709522dba9425a6b45ee671298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0dce10bf671cc2ebc67aa7fd568a9a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42a2b8b43e1fe82fc439d145e91b860c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1174142f3bba761585b6bc2653009b36.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)过点
![](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/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/107babba45f110012183dc4dc54490f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
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【推荐2】已知椭圆C:
的离心率为
,椭圆的上顶点B到两焦点的距离之和为4.
(1)求椭圆C的标准方程;
(2)若直线l:
与椭圆C交于异于点B的两点P,Q,直线BP,BQ与x轴相交于
,
,若
,求证:直线
过一定点,并求出定点坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dd54b9df3402ad91e2d34c40efe0c7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
(1)求椭圆C的标准方程;
(2)若直线l:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15b256345d7109e081b7c895591e995d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b42229367eabde0b0df9c1ecdf6b330a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4d788aae2cf9145c238dcf8f78967f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53d5e2571e6307f10c70a53e06d0277e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
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【推荐1】已知椭圆
:
的一个焦点与抛物线
的焦点相同,且椭圆
过点![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39602b870827af564830f73af7691855.png)
![](https://img.xkw.com/dksih/QBM/2022/1/10/2891548132622336/2892382833598464/STEM/2d6117cf-9d87-43ec-8656-1eca68ce91f1.png?resizew=218)
(1)求椭圆
的标准方程;
(2)若椭圆
的右顶点为
,与
轴不垂直的直线
交椭圆
于
,
两点
与
点不重合,
,且满足
,若点
为
中点,求直线
与
的斜率之积的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48da128547c4cf9745e8e4b99988a3db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4856428c4f87eada4e504fce8cc91d1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39602b870827af564830f73af7691855.png)
![](https://img.xkw.com/dksih/QBM/2022/1/10/2891548132622336/2892382833598464/STEM/2d6117cf-9d87-43ec-8656-1eca68ce91f1.png?resizew=218)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74766719c6e30f189ea586b5a000702a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.png)
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【推荐2】已知椭圆
的左焦点为F,右顶点为A,离心率为
,B为椭圆C上一动点,
面积的最大值为
.
(1)求椭圆C的方程;
(2)经过F且不垂直于坐标轴的直线l与C交于M,N两点,x轴上点P满足
,若
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/851a5d6ec23256f9b4a9e98aa92945fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5989c84e320b504511f23eeb6e7357.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2eaceb8d6c6927e14d9ac7a557a2b11d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f8d7da24c485205172663f40a52c962.png)
(1)求椭圆C的方程;
(2)经过F且不垂直于坐标轴的直线l与C交于M,N两点,x轴上点P满足
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5929048ce5167abc4750589f2e21841.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f12e17d661b91791edef8c135b4705a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
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