已知点P在椭圆C:
上.
(1)P与椭圆的顶点不重合,过P作圆
的两条切线,切点分别为E,F,直线EF与x轴、y轴分别交于点M,N.求证:
为定值;
(2)若
,过P的两条直线交C于A,B两点,两直线PA,PB的斜率之和为0,求直线AB的斜率.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ddab7b8aa22e1ba4c59da7dc04ac9e2.png)
(1)P与椭圆的顶点不重合,过P作圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5f5d967ad135991b6075ee45df55643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de7abc1c27897e27c4e3086f2bb6d8f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26454b354884f8b9d63910d5dc72e1cc.png)
22-23高三上·河南·期末 查看更多[2]
更新时间:2022-12-31 11:35:42
|
相似题推荐
解答题-问答题
|
较易
(0.85)
名校
【推荐1】已知圆
.
(1)过点
作圆
的切线,求切线的方程;
(2)若直线
过点
且被圆
截得的弦长为2,求直线
的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6255863b693c6771b09e95304fcbd60c.png)
(1)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1375ed3dfe4a97e0c87e1adb0a282dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/068b743722e6b96c0586b0e8e8771739.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
您最近一年使用:0次
解答题-问答题
|
较易
(0.85)
名校
【推荐2】已知圆
(1)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8748dc55e2f45bc37fc4d84d7310f79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
(2)若圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f63080caf557613ca126503b920c8ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
您最近一年使用:0次
解答题-问答题
|
较易
(0.85)
名校
解题方法
【推荐1】已知椭圆
经过点
,且离心率为
.
(1)求椭圆E的方程;
(2)若经过点
,且斜率为k的直线与椭圆E交于不同的两点P,Q(均异于点A),证明:直线AP与AQ的斜率之和为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a200ca2c4af794f4d1c6a5443830b5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/383f12cb70ca55eba4ff012771dbfa9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
(1)求椭圆E的方程;
(2)若经过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0f9f734c03d04c21edefa08e0acc1fa.png)
您最近一年使用:0次
解答题-问答题
|
较易
(0.85)
解题方法
【推荐2】椭圆
:
,椭圆
:
(
)的一个焦点坐标为
,斜率为
的直线
与椭圆
相交于
、
两点,线段
的中点
的坐标为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/16/d55180df-19be-44ca-8dc5-83ff02c28847.png?resizew=217)
(1)求椭圆
的方程;
(2)设
为椭圆
上一点,点
、
在椭圆
上,且
,则直线
与直线
的斜率之积是否为定值?若是,求出该定值;若不是,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/271e595c257e4c0ade90a9bbbf0e6b0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7aea48c44781a844b5c19191f70f61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a0c4c098615c6bc7e6dcf72e5b5201a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64d5ef73690a115d5ff64bafb4fdecaf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27e7fe3e2c0c870a922ddba906f4c4dc.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/16/d55180df-19be-44ca-8dc5-83ff02c28847.png?resizew=217)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.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/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32d56117660de8bd784a02bc4069a5a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88e9f7d1272b7344346b58b660aa260a.png)
您最近一年使用:0次
解答题-问答题
|
较易
(0.85)
【推荐1】已知
, 如图, 曲线
由曲线
和曲线
组成,其中点
为曲线
所在圆锥曲线的焦点, 点
, 为曲线
所在圆锥曲线的焦点
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/21/a745d57c-7346-4f2f-983d-c82aee968e6d.png?resizew=251)
(1)若
, 求曲线
的方程;
(2)如图, 作斜率为正数的直线
平行于曲线
的渐近线, 交曲线
于点
, 求弦
的中点
的轨迹方程;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cd83f319fc5f78f83d93751ef4edcbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f09757d013574cf058d5bb944fdf034a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/467635443c8172cc396ac3b916feb34f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d400642dfea9cf7eb05b26d62d9c73ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50da60823b387df26f73e7c2bad6fcdf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afb6101e45f8d7013bc3dc4197188c0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68c4f3fc9c421ef80dd60658fe14ef73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6acfc9319b4dfcefd8f0bb0338f7cbf2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/21/a745d57c-7346-4f2f-983d-c82aee968e6d.png?resizew=251)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6be8b3e7ac6a923e3c36aca410bb293.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f09757d013574cf058d5bb944fdf034a.png)
(2)如图, 作斜率为正数的直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6acfc9319b4dfcefd8f0bb0338f7cbf2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afb6101e45f8d7013bc3dc4197188c0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c72229b08c676c08a3c7258895375f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
您最近一年使用:0次
解答题-问答题
|
较易
(0.85)
名校
解题方法
【推荐2】已知中心在原点的椭圆
的一个焦点为
,点
为椭圆上一点,
的面积为
.
(1)求椭圆
的方程;
(2)是否存在平行于
的直线
,使得直线
与椭圆
相交于
两点,且以线段
为直径的圆恰好经过原点?若存在,求出
的方程,若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98214cac757430c9d5775ad0dadb185a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c73babf9229e388323bb45b828fbce11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae0ad4bcd9d810f4aec3e8c852ff7a4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/144f6c1ca23b33af369d7d37f3fa7ef8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4b8503f4706b8321e4e79a87eadea84.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)是否存在平行于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e52586ca2a3b783bc8092415e2d4bf6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
您最近一年使用:0次