已知椭圆
的离心率为
,且点
在椭圆
上.
(Ⅰ)求椭圆
的方程;
(Ⅱ)已知不经过
点的直线
与椭圆
交于
两点,
关于原点的对称点为
(与点
不重合),直线
与
轴分别交于两点
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbb03c99a2d5c3dd812a8af41e696907.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(Ⅰ)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(Ⅱ)已知不经过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b22448a6663204614aa3f881f4020fa0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6bce3d91ca23b86d8c6625f2632e437.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba48841b189ab1e2f5243da1c31b460c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2765917637583d22a579ff075f9baa3.png)
更新时间:2018-04-26 10:52:28
|
相似题推荐
解答题-问答题
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适中
(0.65)
【推荐1】已知
为圆
:
上任意一点,点
.
(1)若
在圆
上,求线段
的长及直线
的斜率;
(2)求
的最大值和最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70ccc575be18f8709b6fead64de32fbd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc4862828413027cc4a650ab47d5c43a.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/440e9bb4444ceb35f7cc33186a16dd42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2dca049735b45fb9b2533c68605eddc.png)
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解答题-证明题
|
适中
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真题
解题方法
【推荐2】如图,曲线G的方程为
,.以原点为圆心,以t(t >0)为半径的圆分别与曲线G和y轴的正半轴相交于点A与点B.直线AB与x轴相交于点C.
![](https://img.xkw.com/dksih/QBM/2010/8/14/1569814310346752/1569814315622400/STEM/bfb79e1d-21a5-41d3-829d-7d062c6e4c2f.png?resizew=174)
(Ⅰ)求点A的横坐标a与点C的横坐标c的关系式;
(Ⅱ)设曲线G上点D的横坐标为a+2,求证:直线CD的斜率为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67ae401b57404184c8b9df5c93b6386c.png)
![](https://img.xkw.com/dksih/QBM/2010/8/14/1569814310346752/1569814315622400/STEM/bfb79e1d-21a5-41d3-829d-7d062c6e4c2f.png?resizew=174)
(Ⅰ)求点A的横坐标a与点C的横坐标c的关系式;
(Ⅱ)设曲线G上点D的横坐标为a+2,求证:直线CD的斜率为定值.
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解答题-问答题
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名校
解题方法
【推荐1】已知椭圆
的两焦点分别为
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.
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且斜率为
的直线
交椭圆
于
两点,求
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72ba951ce58ff7fb59c57e2d349fdc4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4a4aef3d4c96d68144715b3011eff1d.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)设过椭圆的右焦点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/827ccf0c04aa941ba20d5f4c6068b46b.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/f6bce3d91ca23b86d8c6625f2632e437.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fdc02f00cf00a6dfd88b53a90f1f7a4.png)
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解题方法
【推荐2】在平面直角坐标系
中,椭圆
过点
,
.
(1)求椭圆E的方程;
(2)点
是单位圆
上的任意一点,设
,
,
是椭圆
上异于顶点的三点且满足
.探讨
是否为定值?若是定值,求出该定值,若不是定值,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f2beb91f10d2d8f2aa0dcc3f5cd1598.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b134d6fa0764ba7bbc187b2e3f7e379.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2f596ebd7a2a1f71bc595fae284cf61.png)
(1)求椭圆E的方程;
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cca3c738f498819c5050361872b5290d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88d22c4afd75d76767cbcbc59a3a2436.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
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解答题-作图题
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名校
【推荐1】已知椭圆
的焦距为4,且过点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/25/69f2a8ca-8e16-47c8-9331-9ca993d0a58c.png?resizew=207)
(1)求椭圆
的标准方程;
(2)设
为椭圆
上一点,过点
作
轴的垂线,垂足为
,取点
,连接
,过点
作
的垂线交
轴于点
,点
是点
关于
轴的对称点,作直线
,问这样作出的直线
是否与椭圆
一定有唯一的公共点?并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/851a5d6ec23256f9b4a9e98aa92945fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a5f4493abd2b69f83eae0362c509f1a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/25/69f2a8ca-8e16-47c8-9331-9ca993d0a58c.png?resizew=207)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdb378d97a616af54eebd9ea8046e892.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c65304d03bb720d836e7bbd2fab6e977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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解题方法
【推荐2】已知椭圆
的左右顶点分别为
,离心率
.
(1)求椭圆的方程;
(2)若点
为曲线
:
上任一点(
点不同于
),直线
与直线
交于点
,
为线段
的中点,试判断直线
与曲线
的位置关系,并证明你的结论.
![](https://img.xkw.com/dksih/QBM/2014/6/12/1571770112770048/1571770118774784/STEM/a8f0f31cdd3c4f8e98d755604ae56fcf.png)
![](https://img.xkw.com/dksih/QBM/2014/6/12/1571770112770048/1571770118774784/STEM/d320500970a0427e9f221280def02e95.png)
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(1)求椭圆的方程;
(2)若点
![](https://img.xkw.com/dksih/QBM/2014/6/12/1571770112770048/1571770118774784/STEM/1e9d094e44434bd2ad3a16756c29fef9.png)
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![](https://img.xkw.com/dksih/QBM/2014/6/12/1571770112770048/1571770118774784/STEM/3f46ace5ba774e8d8062af83bba9dca9.png)
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![](https://img.xkw.com/dksih/QBM/2014/6/12/1571770112770048/1571770118774784/STEM/d53df6a1d29d4ab9bbdaf0ca36690d0c.png)
![](https://img.xkw.com/dksih/QBM/2014/6/12/1571770112770048/1571770118774784/STEM/7c619bcd7e914d00ae659f248f5f47bf.png)
![](https://img.xkw.com/dksih/QBM/2014/6/12/1571770112770048/1571770118774784/STEM/9d48cc381e7d4e939454f2f0773541bb.png)
![](https://img.xkw.com/dksih/QBM/2014/6/12/1571770112770048/1571770118774784/STEM/4683e1b1c1164cc68bf20c0dc5497ff7.png)
![](https://img.xkw.com/dksih/QBM/2014/6/12/1571770112770048/1571770118774784/STEM/72e761e085014ae7804332542834a64f.png)
![](https://img.xkw.com/dksih/QBM/2014/6/12/1571770112770048/1571770118774784/STEM/9e1eaf30db9148799f972746888cfbe2.png)
![](https://img.xkw.com/dksih/QBM/2014/6/12/1571770112770048/1571770118774784/STEM/08798be2d50549b9b113f731d63ad3f7.png)
![](https://img.xkw.com/dksih/QBM/2014/6/12/1571770112770048/1571770118774784/STEM/4dc7fc1f4ef3410187310b336f53f1a6.png)
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