已知
,
分别是椭圆
:
的左、右焦点.
(1)求椭圆
的方程;
(2)若
分别在直线
和
上,且
.
(ⅰ) 当
为等腰三角形时,求
的面积;
(ⅱ) 求点
,
到直线
距离之和的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21e9d55173f26afdf0e37462b556a605.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6d6f746c2355072d914591bf60c3801.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21ff83a049b172be21e0138a902380ff.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/639c3d2ff5ee566fcc1b69c65712a661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ea658f3a9359f5740d5aab48f7948.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2015049cd170e89070ec78e4497d381a.png)
(ⅰ) 当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3c07ebcbfacda073208d483c58e8a84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3c07ebcbfacda073208d483c58e8a84.png)
(ⅱ) 求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
更新时间:2017-05-09 08:30:42
|
相似题推荐
解答题-问答题
|
较难
(0.4)
解题方法
【推荐1】如图;.已知椭圆C:
的离心率为
,以椭圆的左顶点T为圆心作圆T:
设圆T与椭圆C交于点M、N.
![](https://img.xkw.com/dksih/QBM/2018/3/23/1908375123673088/1909880930058240/STEM/c14030aafbd44b6f99009d5dbdf3e943.png?resizew=256)
(1)求椭圆C的方程;
(2)求
的最小值,并求此时圆T的方程;
(3)设点P是椭圆C 上异于M,N的任意一点,且直线MP,NP分别与
轴交于点R,S,O为坐标原点. 试问;是否存在使
最大的点P,若存在求出P点的坐标,若不存在说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0dce10bf671cc2ebc67aa7fd568a9a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7c247f7633e3caf5fe0d9d130be1355.png)
![](https://img.xkw.com/dksih/QBM/2018/3/23/1908375123673088/1909880930058240/STEM/c14030aafbd44b6f99009d5dbdf3e943.png?resizew=256)
(1)求椭圆C的方程;
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38677fc803336b415d90ce1a015b2ab7.png)
(3)设点P是椭圆C 上异于M,N的任意一点,且直线MP,NP分别与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebbb4d1bc1fd31b49d657de1d6a94e22.png)
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解答题
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较难
(0.4)
名校
解题方法
【推荐2】已知椭圆![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a5bbb709522dba9425a6b45ee671298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2f8a9e959c49566d8f564f4eb5163e9.png)
的长轴长为
,
为坐标原点.
(1)求椭圆
的方程和离心率.
(2)设点
,动点
在
轴上,动点
在椭圆
上,且点
在
轴的右侧.若
,求四边形
面积的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a5bbb709522dba9425a6b45ee671298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2f8a9e959c49566d8f564f4eb5163e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bcaceadc00d891e292c8bdff9e4ce64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b10e8abf8690e4b129466ddb918bcc94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)设点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f2b1f4120365cb6ee4925fe417563f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/208779e7d75e0bf9250a1abe7f6c5467.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3dc34adbecfb81477b1f29a9338e50cd.png)
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【推荐1】已知椭圆
的上顶点为
,右焦点为
,原点
到直线
的距离为
的面积为1.
(1)求椭圆
的方程;
(2)过点
的直线
与
交于
两点,过点
作
轴于点
,过点
作
轴于点
与
交于点
.
①求证:点
在定直线上,
②求
的面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/767a75d8d8add0ffa3db20e77797df31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b8452ffb321d5cf3887a129757b78e9.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.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/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea91b1fb8690c09739e2981735f1919f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecde35e9255cb7922a86536b05f4a302.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3c217dadaca86779f03a2760377b6be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5d8e33929752b1cb4dd36ee9b98b45d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
①求证:点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
②求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1ed4c4e8edbd179f3fc38a6653f18c1.png)
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解答题-证明题
|
较难
(0.4)
【推荐2】已知曲线
,直线
经过点
与
相交于
、
两点.
![](https://img.xkw.com/dksih/QBM/2017/7/31/1742215806017536/1742630159294464/STEM/71c2c90e124e43d78520ad8ee07af755.png?resizew=203)
(1)若
且
,求证:
必为
的焦点;
(2)设
,若点
在
上,且
的最大值为
,求
的值;
(3)设
为坐标原点,若
,直线
的一个法向量为
,求
面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3efc48d37ccb1878802d73615c9b876a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/140353ab8ef5a64aaea0df37966cb81c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b454cdb97c408300b50d945f002c2cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://img.xkw.com/dksih/QBM/2017/7/31/1742215806017536/1742630159294464/STEM/71c2c90e124e43d78520ad8ee07af755.png?resizew=203)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00b3d68570d200dbcaa7e49635134102.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f601f06177ce400fbd81d415827fea0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b454cdb97c408300b50d945f002c2cb.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8aa5c24766744e194574d31ca534c18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b454cdb97c408300b50d945f002c2cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29aabdfccb91806fd0563b4453c967b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e48edd64399f18bc9a6d556594e3531.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90c31f9f93b491a9e903c02e94e5331e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3ec45b9876041baeeaf40afd8275b21.png)
您最近一年使用:0次
【推荐1】已知直线
,动点
分别在直线
上,
,
是线段
的中点,记点
的轨迹为曲线
.
(1)求曲线
的方程;
(2)已知点
,过点
作直线
与曲线
交于不同的两点
,线段
上一点
满足
,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e37659c39c4f4d6933e4b49df20af7a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44434b647ec546fe787e2164e0be6cd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/699fc9b7e879af4866aaa07848dfb423.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b94469fd19f40116e2dec334919d6586.png)
(1)求曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b94469fd19f40116e2dec334919d6586.png)
(2)已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f40d5459e1385ab7d829ea96ca0b946.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b94469fd19f40116e2dec334919d6586.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39acab3cfb59bfc9591371721ab01d93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c708a642769de87e08886d98f14f13c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a84af713ec9898211637cfa1b0ef3b2.png)
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较难
(0.4)
【推荐2】已知椭圆
的离心率为
,且过点
,设M.F分别是椭圆E的左、右焦点.
(1)是椭圆E的标准方程;
(2)若椭圆E上至少有个不同11的点
,使得
,
,
,…组成公差为d的等差数列,求公差d的取值范围
(3)若过右焦点F的直线交椭圆E于A,B两点,过左焦点M的直线交椭圆E于C,D两点,且
,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7e5578ca83f5bd5c285994061b9c015.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0dfb290b1a84f670549554a0c988593.png)
(1)是椭圆E的标准方程;
(2)若椭圆E上至少有个不同11的点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e1cfbd5f68cbe584ee8703d22920948.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/845bd2ce3dd5fd60df3559af2829ed1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cc39ea95d4abb5d2e8027e3ab3769fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52715a4fb36bdad13214405c644eb923.png)
(3)若过右焦点F的直线交椭圆E于A,B两点,过左焦点M的直线交椭圆E于C,D两点,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a77e3c1c236141d6118429fade0a9b9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/532fb9d8a0715b513e9e3f144ea264e9.png)
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