已知椭圆C:
(
)的离心率为
,点A,B分别是椭圆C的上,下顶点,且
.
(1)求椭圆C的标准方程;
(2)过点
且斜率为k的直线l交椭圆C于E,G两点,设直线AE与直线
交于点H,点H是否在直线BG上?若是,请证明之,若不是,请说明理由.
![](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/8d5989c84e320b504511f23eeb6e7357.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/699fc9b7e879af4866aaa07848dfb423.png)
(1)求椭圆C的标准方程;
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bdfbae913ff7ff8caaefcaacf8c20ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/107babba45f110012183dc4dc54490f7.png)
更新时间:2023-11-27 20:23:56
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解答题-证明题
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解题方法
【推荐1】如图,已知椭圆
的离心率为
,F为椭圆C的右焦点,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/12/58e25e5c-eaaf-4ced-a781-9cdedd4c9f7a.png?resizew=150)
(1)求椭圆C的方程;
(2)设O为原点,P为椭圆上一点,AP的中点为M,直线OM与直线
交于点D,过O且平行于AP的直线与直线
交于点E.求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/323227dd8a7a31c078eac609b9acf472.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
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![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/12/58e25e5c-eaaf-4ced-a781-9cdedd4c9f7a.png?resizew=150)
(1)求椭圆C的方程;
(2)设O为原点,P为椭圆上一点,AP的中点为M,直线OM与直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f23d29646155e27b172ecdf263e2d702.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f23d29646155e27b172ecdf263e2d702.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f307a38b295900b4127badf3a12167b.png)
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【推荐2】已知在平面直角坐标系
中,椭圆
的右顶点为
,上顶点为
,
的面积为
,离心率
.
(1)求椭圆
的方程;
(2)若斜率为
的直线
与圆
相切,且
与椭圆
相交于
、
两点,若弦长
的取值范围为
,求斜率
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/851a5d6ec23256f9b4a9e98aa92945fe.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/075ba8c6fb5ef7288cd3fed425c8e69e.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若斜率为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f240cccaf24af8a796abb95cb42be52e.png)
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![](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/084cf5ffced059f5653ee2a1023518b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81b92075c4fff5c0a08fe4475fd29dff.png)
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【推荐1】已知椭圆C的中心在坐标原点,经过两点
和
.
(1)求椭圆的方程;
(2)过点
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bacfc149ede71417fa599c21b5a84cb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03efa0031095d2186f68e407859eb37d.png)
(1)求椭圆的方程;
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1b6f209d1a805437046ca6ef79dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e08e7b2bb87f2f1056699b06a3be61d6.png)
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解答题-问答题
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【推荐2】已知椭圆
,其短轴长为
,离心率为
,双曲线
的渐近线为
,离心率为
,且
.
(1)求椭圆
的方程;
(2)设椭圆
的右焦点为
,动直线
(
不垂直于坐标轴)交椭圆
于
、
不同两点,设直线
和
的斜率为
、
,若
,试判断该动直线
是否过定点,若是,求出该定点;若不是,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50e48d1edbfb6a5a48f9a95551d1dbc2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38387ba1cadfd3dfc4dea4ca9f613cea.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7bcaf273474069ffe4d6e0db22e2cbf.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
(2)设椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
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