已知椭圆
的焦点坐标为
和
,且椭圆经过点
.
(1)求椭圆
的标准方程;
(2)椭圆
的上、下顶点分别为点
和
,动点
在圆
,动点
在椭圆
上,直线
的斜率分别为
,且
.
(ⅰ)证明:
三点共线;
(ⅱ)求
外接圆直径的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/813f9a2814013e2407b5b1c216159359.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16fd15503ee692f8286b0312f7c6f0cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/748902ce5e3dc5279279d58bf14610d6.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f240cccaf24af8a796abb95cb42be52e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03df57efff473b3cfeb8503796b7d6b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90963760acac7bfad3ae03088c6c80b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/124d17c76931baa8130c9e4a4a8804fe.png)
(ⅰ)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b284b050a9226828f664fbb0a5c7fc9c.png)
(ⅱ)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a11cb104b04c4e6a1be700e81da279a.png)
更新时间:2023-04-30 22:37:18
|
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解答题-问答题
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解题方法
【推荐1】已知焦点在
轴上的椭圆
,其离心率为
,且经过点
.
(1)求椭圆
的标准方程;
(2)过点
的直线
(斜率存在且不为0)与椭圆
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,
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,且满足
,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78e3e091b4c1c4183b5ae434133f851a.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56dba6ef0c00b3442464e6d0f39cf5c1.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/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61c995fc0bd1de576c1e147ca90eb9ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c2269980496c7ab5f7effb287b37f75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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【推荐2】已知椭圆C:
的离心率
,设
,
,
,其中A,B两点在椭圆C上.
(1)求椭圆C的方程;
(2)过点P的直线交椭圆C于M,N两点(M在线段AB上方),在AN上取一点H,连接MH交线段AB于T,若T为MH的中点,证明:直线MH的斜率为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dd54b9df3402ad91e2d34c40efe0c7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/075ba8c6fb5ef7288cd3fed425c8e69e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47e50393462e070cdd43afef269681aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f063799cfdc238a54aa7670a66a7b6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5c10f14aae6fb21e047ecb39cdf40c0.png)
(1)求椭圆C的方程;
(2)过点P的直线交椭圆C于M,N两点(M在线段AB上方),在AN上取一点H,连接MH交线段AB于T,若T为MH的中点,证明:直线MH的斜率为定值.
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名校
解题方法
【推荐1】在平面直角坐标系
中,已知椭圆
,A,B是椭圆上两点,且直线AB的斜率为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/25/f4829aa2-6509-4d8d-90a7-1b3cd3ab7dfe.png?resizew=125)
(1)求证:OA与OB的斜率之积为定值;
(2)设直线AB交圆
于C,D两点,且
,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69daca955a565fa537347dd0d93783f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5989c84e320b504511f23eeb6e7357.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/25/f4829aa2-6509-4d8d-90a7-1b3cd3ab7dfe.png?resizew=125)
(1)求证:OA与OB的斜率之积为定值;
(2)设直线AB交圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79382ba44ba669b5d43fdd5427adf16c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/599bf2810055329fa5fe1fe473bd5cb6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a9a6eeeebf3cff569578d7366b755aa.png)
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【推荐2】如图所示,已知A,B分别是椭圆
的左、右顶点,P,Q是该椭圆上不同于顶点的两点,直线AP与直线QB交于点M,直线AQ与直线PB交于点N.
![](https://img.xkw.com/dksih/QBM/2023/6/16/3260767077679104/3292631686356992/STEM/1a4b0d756c724568b96d359304532aea.png?resizew=221)
(1)证明:
;
(2)若弦PQ过椭圆的右焦点
,求直线MN的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dd54b9df3402ad91e2d34c40efe0c7a.png)
![](https://img.xkw.com/dksih/QBM/2023/6/16/3260767077679104/3292631686356992/STEM/1a4b0d756c724568b96d359304532aea.png?resizew=221)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f479d987bc7abd828c64f9dc745836ab.png)
(2)若弦PQ过椭圆的右焦点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
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