如图,已知椭圆
,左、右焦点分别为
,
,右顶点为
,上顶点为
,
为椭圆上在第一象限内一点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/1/aac8755e-159d-42c3-bd4d-d76b062d7f2a.png?resizew=230)
(1)若
.
①求椭圆的离心率
;
②求直线
的斜率.
(2)若
,
,
成等差数列,且
,求直线
的斜率的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dd54b9df3402ad91e2d34c40efe0c7a.png)
![](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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/1/aac8755e-159d-42c3-bd4d-d76b062d7f2a.png?resizew=230)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06d87fd50f35d766279f41384c7bb81d.png)
①求椭圆的离心率
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/168b3e4b1d6f04226fa2687a72a268b4.png)
②求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ac86e1c253297a377e14fb9a1689be8.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1b3a51deb7af25837ccefcf10eb1262.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70a87481122e5e2714e1e25f85e248a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbac9a87d39df24f7b357890b532718b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39bf40fe48f416db0e0f215ce7cd5286.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ac86e1c253297a377e14fb9a1689be8.png)
更新时间:2020-01-31 21:16:17
|
相似题推荐
解答题-问答题
|
较难
(0.4)
名校
【推荐1】已知
分别是椭圆
的左、右焦点,过
且不与
轴垂直的动直线
与椭圆交于
两点,点
是椭圆
右准线上一点,连结
,当点
为右准线与
轴交点时,有
.
(1)求椭圆
的离心率;
(2)当点
的坐标为
时,求直线
与直线
的斜率之和.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/833fb9b3ad298dcc9ccd2e576663654b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.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/7789a500686c7a73770404ead6af0590.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/2ec8858389f4c3156a946ba8bf0d8a7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6a3389636c499fb100a6f53449b2dd.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80991c1f0c963104740e50cfff6f29a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c8ffe24cf9f327aeb241225ab15ab1a.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
解题方法
【推荐2】已知椭圆
的左焦点为
,离心率为
,
,
是
上的相异两点,
.
(1)若点
,
关于原点对称,且
,求
的取值范围;
(2)若点
,
关于
轴对称,直线
交
于另一点
,直线
与
轴的交点
的横坐标为1,过
的直线交
于
,
两点.已知
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/168b3e4b1d6f04226fa2687a72a268b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/239fce8aa6bab6bda5409149a350d10a.png)
(1)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a601bb181415cf349821d76fc63668.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/168b3e4b1d6f04226fa2687a72a268b4.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.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/d5c7316976a221c051a2c14df80b1347.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7db9b4ac9106bfaf32eba6ae265872b.png)
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【推荐1】已知椭圆
的离心率为
,且过点
.
(1)求E的方程;
(2)设E的左、右顶点分别为A,B,点C,D为E上与A,B不重合的两点,且
.
①证明:直线CD恒过定点
;
②求
面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7e5578ca83f5bd5c285994061b9c015.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5989c84e320b504511f23eeb6e7357.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e2539e41befeca533fc93fae3a14ec8.png)
(1)求E的方程;
(2)设E的左、右顶点分别为A,B,点C,D为E上与A,B不重合的两点,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/357d9412cb6b277a3e317d99135ab64b.png)
①证明:直线CD恒过定点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b47da3d9f8b1f35a3599a31d500c7e9.png)
②求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/661ff55b5ebbadfb600989af3cfce2fd.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
解题方法
【推荐2】如图,椭圆
:
(
)和圆
,已知圆
将椭圆
的长轴三等分,且圆
的面积为
.椭圆
的下顶点为
,过坐标原点
且与坐标轴不重合的任意直线
与圆
相交于点
,直线
与椭圆
的另一个交点分别是点
.
![](https://img.xkw.com/dksih/QBM/2014/7/2/1571806394687488/1571806400569344/STEM/e09079f46ccf4b788e27138352c33651.png?resizew=292)
(1)求椭圆
的方程;
(2)(Ⅰ)设
的斜率为
,直线
斜率为
,求
的值;
(Ⅱ)求△
面积最大时直线
的方程.
![](https://img.xkw.com/dksih/QBM/2015/12/14/1572356600561664/1572356606959616/STEM/e1da1fdf5c8f4458aa6d4f77fb7651af.png?resizew=19)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcc1779e03ec80e4c4fcfa1a5024ea5e.png)
![](https://img.xkw.com/dksih/QBM/2015/12/14/1572356600561664/1572356606959616/STEM/324fcc4c04474d73ad39915463152204.png?resizew=75)
![](https://img.xkw.com/dksih/QBM/2015/12/14/1572356600561664/1572356606959616/STEM/d5839bec14ef4ae795ec1ba0c2698a0e.png?resizew=107)
![](https://img.xkw.com/dksih/QBM/2015/12/14/1572356600561664/1572356606959616/STEM/d345eb3ca1ba4e3c908cc7ef498181fc.png?resizew=20)
![](https://img.xkw.com/dksih/QBM/2015/12/14/1572356600561664/1572356606959616/STEM/e1da1fdf5c8f4458aa6d4f77fb7651af.png?resizew=19)
![](https://img.xkw.com/dksih/QBM/2015/12/14/1572356600561664/1572356606959616/STEM/d345eb3ca1ba4e3c908cc7ef498181fc.png?resizew=20)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86ebba6ed1add0fe647c0226614b9290.png)
![](https://img.xkw.com/dksih/QBM/2015/12/14/1572356600561664/1572356606959616/STEM/e1da1fdf5c8f4458aa6d4f77fb7651af.png?resizew=19)
![](https://img.xkw.com/dksih/QBM/2015/12/14/1572356600561664/1572356606959616/STEM/8edb0aa75b934c7aaeca26cec390b5b9.png?resizew=16)
![](https://img.xkw.com/dksih/QBM/2015/12/14/1572356600561664/1572356606959616/STEM/f1a43beaacc84a79971742cb96173304.png?resizew=16)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://img.xkw.com/dksih/QBM/2015/12/14/1572356600561664/1572356606959616/STEM/d345eb3ca1ba4e3c908cc7ef498181fc.png?resizew=20)
![](https://img.xkw.com/dksih/QBM/2015/12/14/1572356600561664/1572356606959616/STEM/2a1b93d1eaec4bf8822732e78cb0efce.png?resizew=43)
![](https://img.xkw.com/dksih/QBM/2015/12/14/1572356600561664/1572356606959616/STEM/ec7ecd02094748b3907d3bd02e0ffcbd.png?resizew=61)
![](https://img.xkw.com/dksih/QBM/2015/12/14/1572356600561664/1572356606959616/STEM/e1da1fdf5c8f4458aa6d4f77fb7651af.png?resizew=19)
![](https://img.xkw.com/dksih/QBM/2015/12/14/1572356600561664/1572356606959616/STEM/5b78b9cdd12a4dfdacc658ef9d0ef655.png?resizew=47)
![](https://img.xkw.com/dksih/QBM/2014/7/2/1571806394687488/1571806400569344/STEM/e09079f46ccf4b788e27138352c33651.png?resizew=292)
(1)求椭圆
![](https://img.xkw.com/dksih/QBM/2015/12/14/1572356600561664/1572356606959616/STEM/e1da1fdf5c8f4458aa6d4f77fb7651af.png?resizew=19)
(2)(Ⅰ)设
![](https://img.xkw.com/dksih/QBM/2015/12/14/1572356600561664/1572356606959616/STEM/470b6e30f33a48c485fd45481906d4f2.png?resizew=31)
![](https://img.xkw.com/dksih/QBM/2015/12/14/1572356600561664/1572356606959616/STEM/b10adc9da2774b558105eb0e1eaf0d3b.png?resizew=9)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://img.xkw.com/dksih/QBM/2015/12/14/1572356600561664/1572356606959616/STEM/1acf928ab611411f997ab5387dd78048.png?resizew=20)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ca278dde92440625d929af8f06b301a.png)
(Ⅱ)求△
![](https://img.xkw.com/dksih/QBM/2015/12/14/1572356600561664/1572356606959616/STEM/53551c1ceaaa4595b6127811304b79ad.png?resizew=41)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
名校
解题方法
【推荐1】设点
的坐标分别为
,直线
相交于点
,且它们的斜率之积
.
(1)求点
的轨迹方程;
(2)在点
的轨迹上有一点
且点
在
轴的上方,
,求
的范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b247c7428cd4ab78dff8a9dabe30279.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55fb7ec4aa413693f4ecae59fe0e2084.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e335802c3d1c085d69efaaf5a83bf117.png)
(1)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(2)在点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8b3bfde4b7cbca10de7d63bb7b2cfd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
您最近一年使用:0次
【推荐2】已知椭圆
,
、
为椭圆的左右焦点,
、
为椭圆的左、右顶点,直线
与椭圆
交于
、
两点.
(1)若
,求
;
(2)设直线
和直线
的斜率分别为
、
,且直线
与线段
交于点
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ddb1c2733cfd9c923101fcd9b17b2c8.png)
![](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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a0a06f1803631b0b3112ec57ca44a70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28448931a5521b93ef1d112a4a523e5d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4dfec890cdfdda355e19463f3be813.png)
(2)设直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6defc43285a40f7ccb74c1cc04265eba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03b58edb637c5dfa03794f3952de9d83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/643ef7d761de0e794fc39937dc72ac6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67351fe10fcfc3f9072eec4c60bfaaa5.png)
您最近一年使用:0次