已知椭圆
经过点
,其左焦点为
;过F点的直线l交椭圆于A,B两点,交y轴的正半轴于点M;
(1)求椭圆E的方程;
(2)若直线l过点F且斜率存在,设斜率为k,求弦长
关于k的函数解析式;
(3)过点F且与l垂直的直线交椭圆于C,D两点,若四边形
的面积为
,求直线l的方程;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7e5578ca83f5bd5c285994061b9c015.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ef233ad3db01fa3ce9ee94eaad8e64e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f506bcb56127e1345ec989ae07375ca.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/9/bd682ec7-7f68-4315-8153-7e3847b532ce.png?resizew=206)
(1)求椭圆E的方程;
(2)若直线l过点F且斜率存在,设斜率为k,求弦长
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaff41080fdea43eea7efedf9ebc1498.png)
(3)过点F且与l垂直的直线交椭圆于C,D两点,若四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c593ebdb2f1934a0cb56f8c44f454f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d599cb4a589f90b0205f24c2e1fa021e.png)
更新时间:2023-08-08 13:15:05
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解答题-证明题
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解题方法
【推荐1】已知椭圆
的焦距与短轴长相等,点
在椭圆上.
(1)求椭圆的标准方程;
(2)已知圆
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(1)求椭圆的标准方程;
(2)已知圆
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【推荐2】已知椭圆
的离心率为
,且过点
.
(1)求
的方程;
(2)若直线
与
有且只有一个公共点,求
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
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(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7f068b803e8cdda5140f87f3526ca4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
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解答题-问答题
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适中
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【推荐1】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)
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(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2】已知椭圆M:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b060841938313042cc2963204e7bd17f.png)
的一个焦点为
,左右顶点分别为A,B.经过点
的直线l与椭圆M交于C,D两点.
(Ⅰ)求椭圆
方程;
(Ⅱ)当直线l的倾斜角为
时,求线段CD的长;
(Ⅲ)记△ABD与△ABC的面积分别为
和
,求
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b060841938313042cc2963204e7bd17f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab9cd3690e7aa3debb1ed054a9f622da.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
(Ⅰ)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(Ⅱ)当直线l的倾斜角为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1e5fa72f2878b476bc57f0df12d6555.png)
(Ⅲ)记△ABD与△ABC的面积分别为
![](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/c59c4295f918205f5598ecc9a96d8867.png)
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解答题-问答题
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适中
(0.65)
解题方法
【推荐1】设椭圆M:
的离心率为
,且内切于圆
.
(1)求椭圆M的方程;
(2)若直线
交椭圆于
、
两点,椭圆上一点
,求
面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2e9d7f49585109a54245a3966654bcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5989c84e320b504511f23eeb6e7357.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5f5d967ad135991b6075ee45df55643.png)
(1)求椭圆M的方程;
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73207781051cab9edfd99af7eda3400c.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/3499c82cf2819f84f7a65e9a02c758fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2205cffebf8c4d5f81d15ed7b85c8936.png)
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【推荐2】把半个椭圆与圆的一段圆弧拼凑于一起,我们把这种曲线称之为“扁圆”.现有半椭圆
与圆弧
组成扁圆,其中
为
的右焦点,
分别为“扁圆”与
轴的左右交点,
分别为“扁圆”与
轴的上下交点,已知
,过
的直线与“扁圆”交于
两点.
(1)求出
与
的方程;
(2)当
时,求
;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8415e7b3743089333530b9ba06d93898.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f10107f69fa911b6e3f5e6c1dc74c77e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00442d96d695db2c58bf1fb7165fca94.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04d468be20b4d43f5de75416de20e8ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6bce3d91ca23b86d8c6625f2632e437.png)
(1)求出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
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(2)当
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您最近一年使用:0次