1 . 已知椭圆
,点
,点
满足
(其中
为坐标原点),点
在椭圆
上.
(1)求椭圆
的标准方程;
(2)设椭圆的右焦点为
,若不经过点
的直线
与椭圆
交于
两点.且与圆
相切.
的周长是否为定值?若是,求出定值;若不是,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eed6b9540857e386651e191a0a5b5a98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a932be759af5806cc4d5cb06dba1669.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f0e5df6dc2c9feed64a2f3cdcbe8018.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4cf40b6cf2051622c0a52e84710c138.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)设椭圆的右焦点为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50b5d43b29783d7b5498a9bf9150fe15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f240cccaf24af8a796abb95cb42be52e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a33181b27b10690b4913595f8c1f46e.png)
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2020-03-13更新
|
466次组卷
|
3卷引用:2019届黑龙江省学业水平考试数学(文科)试卷
名校
2 . 已知椭圆
的离心率为
,且过点
,若点
在椭圆C上,则点
称为点M的一个“椭点”.
(1)求椭圆C的标准方程;
(2)若直线
与椭圆C相交于A,B两点,且A,B两点的“椭点”分别为P,Q,以PQ为直径的圆经过坐标原点,试判断
的面积是否为定值?若为定值,求出定值;若不为定值,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5989c84e320b504511f23eeb6e7357.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe8530b8e246a9a5ec9fe3b9c347d5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22962a2ad892cb6b14ab039a06e8cdc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/915805abfac8f498563f530b9f244592.png)
(1)求椭圆C的标准方程;
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fc5bd66dd6d5e09ff0893a938aed56e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
您最近一年使用:0次
2020-02-27更新
|
313次组卷
|
2卷引用:2018级山东师大附中第五次学分认定考试数学试题
2020高三·江苏·专题练习
3 . 已知椭圆E:
+
=1(a>b>0)的离心率为
,焦点到相应准线的距离为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/1/391632be-5af3-4ef3-a312-e146bb15b6b8.png?resizew=186)
(1) 求椭圆E的标准方程;
(2) 已知P(t,0)为椭圆E外一动点,过点P分别作直线l1和l2,直线l1和l2分别交椭圆E于点A,B和点C,D,且l1和l2的斜率分别为定值k1和k2,求证:
为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7355be4fcbc3130a5951364a3be76d6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5268413295580cfda0755ab458b36b64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/827ccf0c04aa941ba20d5f4c6068b46b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/1/391632be-5af3-4ef3-a312-e146bb15b6b8.png?resizew=186)
(1) 求椭圆E的标准方程;
(2) 已知P(t,0)为椭圆E外一动点,过点P分别作直线l1和l2,直线l1和l2分别交椭圆E于点A,B和点C,D,且l1和l2的斜率分别为定值k1和k2,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c2efd9f1d286d417d5596e4fa2b52a4.png)
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