已知直线
所经过的定点
恰好是椭圆
的一个焦点,且椭圆
上的点到点
的最大距离为8.
(1)求椭圆
的标准方程;
(2)设直线AB过点
且与椭圆
相交于点A、B,
是否为定值,若是求出这个定值,若不是说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8dc059a874676e14f8973bc7bc6ba7eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)设直线AB过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01bece4bb3068ac3b5f9c875f1111c24.png)
更新时间:2016-12-03 13:07:49
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相似题推荐
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【推荐1】已知直线
交
轴正半轴于
,交
轴正半轴于
.
(1)
为坐标原点,求
的面积最小时直线
的方程;
(2)设点
是直线
经过的定点,求
的值最小时直线
的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6296c50a900aa2c3548cb7043a130ec4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
(2)设点
![](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/abe1edfa25bb35a13621066bca829fb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
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解答题-证明题
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【推荐2】已知圆
,直线
.
![](https://img.xkw.com/dksih/QBM/2020/12/20/2618193587372032/2623860112736256/STEM/8e87d257-0e99-4f79-a43a-75d0cb2f6189.png?resizew=258)
(1)求证:直线
过定点;
(2)求直线
被圆C所截得的弦长最短时m的值;
(3)已知点
,试探究:在直线
上(C为圆心)是否存在定点N(异于点M),满足:对于圆C上任一点P,都有
为一常数,若存在,试求所有满足条件的点N的坐标及该常数.若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45a701c610cba22cd4fab7eecf98b8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab80cefceead47b546ddc4793e448eff.png)
![](https://img.xkw.com/dksih/QBM/2020/12/20/2618193587372032/2623860112736256/STEM/8e87d257-0e99-4f79-a43a-75d0cb2f6189.png?resizew=258)
(1)求证:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
(3)已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16274230f4a283d2817dcd1aec792f18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c884b508394b3ab50734b584d9ec783c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b76c248b2e6c992291507591c78af62e.png)
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【推荐1】已知点F是椭圆C:
的右焦点,且其短轴长
,若
点满足
(其中点O为坐标原点).
(1)求椭圆的方程;
(2)若斜率为1的直线与椭圆C交于P,Q两点,与y轴交于点B,若点P是线段BQ的中点,求该直线方程;若
,求实数a的值;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48da128547c4cf9745e8e4b99988a3db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e2031d209711b058f3d278ede3c1d33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b3a9eafdae21f4a030c8bead2db8594.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abace98b6f21234007c3f9efbebb0164.png)
(1)求椭圆的方程;
(2)若斜率为1的直线与椭圆C交于P,Q两点,与y轴交于点B,若点P是线段BQ的中点,求该直线方程;若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cdb9d8425d73a68731f30e0c0e22260.png)
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【推荐2】已知椭圆
(
)长轴长为短轴长的两倍,连结椭圆的四个顶点得到的菱形的面积为4,直线
过点
,且与椭圆相交于另一点
.
(1)求椭圆的方程;
(2)若线段
长为
,求直线
的倾斜角.
![](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/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b83770dfcae8b8e1288aa85d50a63d0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(1)求椭圆的方程;
(2)若线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cee7999b079f73b469a90326b151a55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
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【推荐1】已知椭圆,椭圆
.点
为椭圆
上的动点,直线
与椭圆
交于
,
两点,且
.
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
(2)以点
![](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/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.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/9c593ebdb2f1934a0cb56f8c44f454f8.png)
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【推荐2】已知椭圆
的离心率为
,以坐标原点为圆心,以椭圆M的短半轴长为半径的圆与直线
有且只有一个公共点.
(1)求椭圆M的标准方程;
(2)过椭圆M的右焦点F的直线
交椭圆M于A,B两点,过F且垂直于直线
的直线
交椭圆M于C,D两点,则是否存在实数
使
成立?若存在,求出
的值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36c6162828793e697cb1ad643b287c4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d38f9106cef0b638e62c90afc1c523cd.png)
(1)求椭圆M的标准方程;
(2)过椭圆M的右焦点F的直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/174fbf6858730b889380c99f1bb1d532.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
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【推荐1】如图,已知椭圆
:
,离心率为
,
,
为椭圆的左、右焦点,
为椭圆上一动点,
为
的内心,连接
并延长交
轴于点
.
![](https://img.xkw.com/dksih/QBM/2021/4/28/2709417112903680/2709439195185152/STEM/8f9d7376907042a6a65e1f68c2ca7dbe.png?resizew=186)
(1)求椭圆
的方程;
(2)设
,
的面积分别为
,
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7aea48c44781a844b5c19191f70f61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1174142f3bba761585b6bc2653009b36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/486279e7ff9f2b76c2ce712f5dedcb9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/385afe18c3fad66fdeadf74be824283c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33d776753746914c2410a3946c357f35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://img.xkw.com/dksih/QBM/2021/4/28/2709417112903680/2709439195185152/STEM/8f9d7376907042a6a65e1f68c2ca7dbe.png?resizew=186)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edc5fbc1a4a419a92760035321319996.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9886d403726994d9175448e0e2225419.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/235f0a6fb218d28383e6f27f2df1f50f.png)
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