已知椭圆
的一个焦点与短轴的两端点组成一个正三角形的三个顶点,且椭圆经过点
.
(1)求椭圆
的方程;
(2)若直线
与圆
相切于点
,且交椭圆
于
两点,射线
于椭圆
交于点
,设
的面积与
的面积分别为
.
①求
的最大值;
②当
取得最大值时,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e829105388311d42b94ca2c2654851de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a988618f213e540defa3d4c35ed7901.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0df0f749bade0fecaf191a409899decc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5dc341902984fbfe479ccd677b6faa68.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/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b8189f7b0ffe4d20bf0fad43b4ed589.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc1ddff9c93c234562c44d1808831bc5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3637753af5ce86be9c23a9beb6b5067.png)
①求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/235f0a6fb218d28383e6f27f2df1f50f.png)
20-21高二上·四川成都·阶段练习 查看更多[6]
四川省成都石室中学2020-2021学年高二上学期10月月考数学理科试题江西省丰城中学、高安二中等六校2021届高三1月联考数学(理)试题(已下线)专题04 圆锥曲线(难点)-2020-2021学年高二数学下学期期末专项复习(北师大版2019选择性必修第一册、第二册)重庆市万州第二高级中学2021-2022学年高二下学期入学考试数学试题陕西省西安中学2022-2023学年高二上学期期中理科数学试题河南省周口市太康县2022-2023学年高二上学期期末质量检测数学(文)试题
更新时间:2020-10-19 14:32:37
|
相似题推荐
解答题-证明题
|
困难
(0.15)
解题方法
【推荐1】已知椭圆
过点
,
分别为椭圆C的左、右焦点且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/4/bc8d2ac0-fbb5-4154-b55d-353165a57a56.png?resizew=229)
(1)求椭圆C的方程;
(2)过P点的直线
与椭圆C有且只有一个公共点,直线
平行于OP(O为原点),且与椭圆C交于两点A、B,与直线
交于点M(M介于A、B两点之间).
(i)当
面积最大时,求
的方程;
(ii)求证:
,并判断
,
的斜率是否可以按某种顺序构成等比数列.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/851a5d6ec23256f9b4a9e98aa92945fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f13bf66fc845b115de4ec45b4be0e23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8989cd07bd3d5f89627c3acb24c0a462.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/4/bc8d2ac0-fbb5-4154-b55d-353165a57a56.png?resizew=229)
(1)求椭圆C的方程;
(2)过P点的直线
![](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/707ea658f3a9359f5740d5aab48f7948.png)
(i)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2205cffebf8c4d5f81d15ed7b85c8936.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
(ii)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb53c7cc8aac84b2ae3ef769bb46adb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44434b647ec546fe787e2164e0be6cd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/790ef3382b1c731f2885eecfd92c2a86.png)
您最近一年使用:0次
【推荐2】椭圆
的右顶点为A,上顶点为B,O为坐标原点,直线
的斜率为
,
的面积为1.
(1)求椭圆的标准方程;
(2)椭圆上有两点M,N(异于椭圆顶点,且MN与x轴不垂直),证明:当
的面积最大时,直线
与
的斜率之积为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48da128547c4cf9745e8e4b99988a3db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3389f53711264b0acba3ba6019f8b908.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe95f656b98b53f71a9d72bf0c9a4b9.png)
(1)求椭圆的标准方程;
(2)椭圆上有两点M,N(异于椭圆顶点,且MN与x轴不垂直),证明:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25dd698d57d1cf239eb8752aecaaa4f4.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
|
困难
(0.15)
名校
解题方法
【推荐1】已知椭圆Γ:
的左、右焦点分别为
,
,点
在Γ上,动直线l交Γ于B,C两点,且与y轴交于点D.当直线l经过点
时,四边形
的周长为8.
(1)求Γ的标准方程;
(2)若
是
的垂心,求
.
![](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/23a84757fa1fc2e9bf6134c12dce7fe0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfffd420523729074995e9e55f464d4c.png)
(1)求Γ的标准方程;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9a4e603a1feb6ccb810601951fd6d1c.png)
您最近一年使用:0次
【推荐2】已知椭圆
:
的左、右焦点分别为
,
,上顶点为
,
到直线
的距离为
,且
.
(1)求椭圆
的标准方程;
(2)过
的直线m与椭圆
交于
两点,过
且与m垂直的直线n与圆O:
交于C,D两点,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e345142d3e746168664cf54edcd9b4d7.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/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e86dbcf83cd5d3421b3eed7be7dab32d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a905c6fdf31080227d0f82a3080f3d4.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(2)过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5f5d967ad135991b6075ee45df55643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4503fcbaca90a4acc6a714bcbda9c8fa.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】如图,已知点
分别是椭圆
的左、右焦点,A,B是椭圆C上不同的两点,且
,连接
,且
交于点Q.
时,求点B的横坐标;
(2)若
的面积为
,试求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/279cefeb5c389a37a71e5fd3925f5954.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67c2adf02f5d5a3e1e58a9df353f5fdd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8745517aece48c6fea01087a370827ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8745517aece48c6fea01087a370827ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f2f2d7c81cb44416bcdf59419637682.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b17f20c25bb16153b5f2d25062ed7a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d3ba6ab6e4b958f6d52e46575aabd46.png)
您最近一年使用:0次
【推荐2】如图,已知椭圆
上一点
,右焦点为
,直线
交椭圆于
点,且满足
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/28/3afa352d-2fbb-49d6-9263-ce140e69e670.png?resizew=216)
(1)求椭圆
的方程;
(2)若直线
与椭圆相交于
两点,求四边形
面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f1dc3f9b1eb1727efd1717a745ffbe5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da05297b6cc5fcde1cf490c4265af9c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b6fe0f38ab3095ac6575faa02914b8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e8e7fce9956e1e349470e30af7ce279.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8e868e956831a573f3a5ab725c3041b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/28/3afa352d-2fbb-49d6-9263-ce140e69e670.png?resizew=216)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a08a1b0fdc196de310feb0036204a8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39acab3cfb59bfc9591371721ab01d93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c593ebdb2f1934a0cb56f8c44f454f8.png)
您最近一年使用:0次