已知椭圆
的离心率为
,左、右焦点分别为
、
,且过点
.
(1)求C的方程;
(2)设点M为C上的动点,求
的取值范围;
(3)设椭圆C的左顶点为A,不过点A的直线
(
,
)与C交于P,Q两点,PQ的中点为E,若
,求证:直线l经过定点,并求出定点坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5989c84e320b504511f23eeb6e7357.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/937dbb96343b8a9e52718e785e9eda43.png)
(1)求C的方程;
(2)设点M为C上的动点,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7745604bdf7e7cd450a03641f4938b32.png)
(3)设椭圆C的左顶点为A,不过点A的直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fc5bd66dd6d5e09ff0893a938aed56e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2c80c26a794a844127aae7dee87c93b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcd9218a657b17654c5d757a6f7dee9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58294d7a6621807f6fcc09d779f15f7a.png)
更新时间:2021-01-25 20:01:12
|
相似题推荐
解答题-问答题
|
困难
(0.15)
名校
【推荐1】已知椭圆
的两个焦点分别为
,
,
,过点
的直线与椭圆相交于点A,B两点,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb6c5974b2cef2560cd0c786452cfa3c.png)
(1)若
,求椭圆的方程;
(2)直线AB的斜率;
(3)设点C与点A关于坐标原点对称,直线
上有一点
在
的外接圆上,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/253d66c988026ffcfe1e9a8e89dd2e71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd17b0e1ff511a4042008ec2a01a28c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b5621cf76cd7b7281142cd6a44c712f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c79182bc0073826f40cb655297116b61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d554f13198bb77388f67743bf19ecb4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb6c5974b2cef2560cd0c786452cfa3c.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5af039cad52ca4e1f1e322277bc81afd.png)
(2)直线AB的斜率;
(3)设点C与点A关于坐标原点对称,直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c429b542abf0ebee74a239b4857cf88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a3a7c34b8e71fa334dc29f54cb6137f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9793e563df4c56df01f619202465075d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44ab7024f73ff0cb7e6a48197538a91e.png)
您最近一年使用:0次
【推荐2】已知抛物线
的焦点与椭圆
的右焦点
重合,椭圆
的短轴长为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/20/db796c73-9fe2-4363-a55d-fe74f5e68e21.png?resizew=151)
(1)求椭圆
的方程;
(2)过点
且斜率为
的直线
交椭圆
于
两点,交抛物线
于
两点,请问是否存在实常数
,使
为定值?若存在,求出
的值及定值;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/384a5ece40544f0dbe0ddd07400f5295.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7e5578ca83f5bd5c285994061b9c015.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38387ba1cadfd3dfc4dea4ca9f613cea.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/20/db796c73-9fe2-4363-a55d-fe74f5e68e21.png?resizew=151)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8beef5e9a59a6e83f5cff1cd0ab70a60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
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【推荐1】已知椭圆
,过动点
的直线
交
轴于点
,交椭圆于点
,
(点
在第一象限),且
是线段
的中点,过点
作
轴的垂线交椭圆于另一点
,延长
交椭圆于点
.点
在椭圆上.
![](https://img.xkw.com/dksih/QBM/2021/6/27/2751611170848768/2784057166553088/STEM/74833893-7f30-4681-a2d3-2de4a8b597fc.png)
(1)求椭圆的焦距;
(2)设直线
的斜率为
,直线
的斜率为
,证明:
为定值;
(3)求直线
倾斜角的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a032dd225bdd793172220c494c2054e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d224886bff118ce5971c74f252fdfbc2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.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/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c8ffe24cf9f327aeb241225ab15ab1a.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/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db8305c4ffbf876642440c3d28e91e9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0750f4c9c674954dac4239549dd50a71.png)
![](https://img.xkw.com/dksih/QBM/2021/6/27/2751611170848768/2784057166553088/STEM/74833893-7f30-4681-a2d3-2de4a8b597fc.png)
(1)求椭圆的焦距;
(2)设直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db8305c4ffbf876642440c3d28e91e9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4ded6dbecb802a8a296e767c4b41ea4.png)
(3)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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解答题-问答题
|
困难
(0.15)
解题方法
【推荐2】已知椭圆
和双曲线
的焦距相同,且椭圆
经过点
,椭圆
的上、下顶点分别为
,点
在椭圆
上且异于点
,直线
与直线
分别交于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/7/75b1b072-1e3b-4a1a-80fe-44f13c992955.png?resizew=204)
(1)求椭圆
的标准方程;
(2)当点
运动时,以
为直径的圆是否经过
轴上的定点?请证明你的结论.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acca1c00ee33a8d7aabf1d626541259e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e454c7161999e2a67138869f59d319b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.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/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b6074284a3d33225adde446bed11b79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fec96b5e74f5c2915a1d34d0fdeb737.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/7/75b1b072-1e3b-4a1a-80fe-44f13c992955.png?resizew=204)
(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/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
您最近一年使用:0次
解答题-问答题
|
困难
(0.15)
名校
【推荐1】已知点
,直线
为平面内的动点,过点
作直线
的垂线,垂足为点
,且
.
(1)求动点
的轨迹
的方程;
(2)过点
作直线
(与
轴不重合)交
轨迹于
,
两点,求三角形面积
的取值范围.(
为坐标原点)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94c91fbb77d2a8592d834d2cde583ecd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d506e5bc7cf28e184e8c5772c413d1a7.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/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54e5e0cb5d2795c578649782aae1faff.png)
(1)求动点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4819c39c281427826e1b3f7a4c2b720.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
您最近一年使用:0次
解答题-问答题
|
困难
(0.15)
名校
解题方法
【推荐1】设圆
的圆心为A,直线l过点
且与x轴不重合,l交圆A于C,D两点,过B作AC的平行线交AD于点E.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/bfd9300d-e651-4e45-832b-0ba80058a90e.png?resizew=187)
(1)判断
与题中圆A的半径的大小关系,并写出点E的轨迹方程;
(2)过点
作斜率为
,
的两条直线,分别交点E的轨迹于M,N两点,且
,证明:直线MN必过定点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51b9b12aa0d1d0b5bf0a62f4d09f0f1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/513eafd10fa1ec0196562865517e0b09.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/bfd9300d-e651-4e45-832b-0ba80058a90e.png?resizew=187)
(1)判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13b2b09f9c6800d238e8d34018a01fb1.png)
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1b6f209d1a805437046ca6ef79dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6defc43285a40f7ccb74c1cc04265eba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/423b7ae39db552e60ee8b1d27312306f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ec7bcf5820dfe70290259c2d7ac1ea5.png)
您最近一年使用:0次
解答题-问答题
|
困难
(0.15)
解题方法
【推荐2】已知椭圆
的离心率为
;
是
的左焦点,直线
与
相交于
,
两点,直线
与
的另一交点为
,直线
与
的另一交点为
.当
时,
的面积为3.
(1)求
的方程;
(2)证明:直线
经过定点
.
![](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/04add41d4f548a8cca7e06703c8f2d64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bae6883ecce3bdd570260fb0b52fa7a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.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/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.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/fd876a2ed79c64bacc3e64b8ee92735e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/004104bafb5f30338123d4ea2b7fedde.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(2)证明:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a373beeede5bff441694e824c8f93629.png)
您最近一年使用:0次