解题方法
1 . 椭圆
的左、右焦点分别为
,
,过
且斜率大于0的直线l与C相交于A,B两点.若
内切圆的半径为
,则l的斜率为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/279cefeb5c389a37a71e5fd3925f5954.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/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5eb2485f90dbfd0dfd6e7d179a856f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36fc07486f804358983a79746f8a9e41.png)
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2 . 已知椭圆
的左、右焦点分别为
,点P为第一象限内椭圆上一点,
的内心为
,且
,则椭圆的离心率为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48da128547c4cf9745e8e4b99988a3db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c38928a92bc4b44ed3c9b89769f5372.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/002ed1ebb2cb936e10ab478789f91c7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21a6b1d708b728f24242eb294e34ac1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6077ddbe77a485bf697fb00e663ca073.png)
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2024-02-27更新
|
1432次组卷
|
6卷引用:河南省焦作市博爱县第一中学2024届高三三模数学试题
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3 . 设椭圆
:
的左、右焦点分别为
,
.若点
在
上,则
的周长为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/658504df55afb5242d028af40c29fbd4.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/7e90064d012356de1877aa697cd6d6ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2cfd997d3b66a3b8f7731b26f0ab0c8.png)
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4 . 已知直线l:
经过椭圆C:
的左焦点
,且与椭圆C相交于M,N两点,
为椭圆的右焦点,
的周长为16,则此椭圆的短轴长为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c32c935806559b1a913a7edb3c804999.png)
![](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/5585a42c8f07ad90b94ace9db3d78994.png)
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2023-11-14更新
|
750次组卷
|
3卷引用:河南省开封市五县2023-2024学年高二上学期联考数学试题
河南省开封市五县2023-2024学年高二上学期联考数学试题重庆市部分区2022-2023学年高二上学期期末联考数学试题(已下线)2.2.1 椭圆的标准方程(十三大题型)(分层练习)-2023-2024学年高二数学同步精品课堂(沪教版2020选择性必修第一册)
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5 . 已知椭圆C:
的左、右焦点分别为
,
,点
,点P在x轴上,
,且
为线段
的中点,则C的离心率为______ .
![](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/48c09615735d331befd07664aa47cb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd16ba9543e5b5108e9e37e9ff56e74e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da01a3abe1c9dc4e6283afa0dc1a0d39.png)
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6 . 过椭圆
的右焦点F且与长轴垂直的弦的长为
,过点
且斜率为
的直线与
相交于
两点,若
恰好是
的中点,则椭圆
上一点
到
的距离的最大值为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8af2fdf1944afebb51cb6a5e6c74aadd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4754fbe523ca63eba3810a3f88f37df3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acbc6a613224461ade69362d46550474.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](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/a0ed1ec316bc54c37c4286c208f55667.png)
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2023-11-01更新
|
785次组卷
|
6卷引用:河南省郑州市第十八中学2023-2024学年高二上学期期末模拟数学试题(三)
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7 . 某休闲广场呈椭圆形,在该椭圆的两个焦点及中心处分别安装有三盏景观灯A,B,C,其中灯B位于灯A的正东400m处.小王沿着该休闲广场的边沿散步,在散步的过程中,他与灯B的最短距离为50m.当小王行走到点M处时,他与灯A,B的距离之比为
,则此时他与灯C的距离为______ m.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b1dcdac71e394e495d069f64e1f1ce9.png)
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2023-10-07更新
|
533次组卷
|
6卷引用:河南省2023-2024学年高三上学期一轮复习摸底测试(一)数学试题
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8 . 已知点P是椭圆
1上一点,
,
是椭圆的两个焦点,若![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74406a3e75444a8a981cf47be8f2d1c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c97ec04a1aa7ac6fce72d589864940a2.png)
=0,则△P
的面积为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/824cddd01aa264b01b625c0dd67fe3dd.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/74406a3e75444a8a981cf47be8f2d1c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c97ec04a1aa7ac6fce72d589864940a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ed0d85d62ecedf0d56a088b5e875408.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/643ef7d761de0e794fc39937dc72ac6a.png)
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2023-08-03更新
|
1689次组卷
|
7卷引用:河南省郑州市基石中学2023-2024学年高二上学期1月月考数学试题
河南省郑州市基石中学2023-2024学年高二上学期1月月考数学试题人教A版(2019) 选修第一册 第三章 阶段测评(四) 椭圆人教A版(2019) 选修第一册 数学奇书 第三章 圆锥曲线的方程 3.1 椭圆 3.1.2 椭圆的简单几何性质 第2课时 椭圆方程与性质的应用(已下线)3.1.1 椭圆及其标准方程(精练)-2023-2024学年高二数学《一隅三反》系列(人教A版2019选择性必修第一册)(已下线)3.1.1 椭圆的标准方程(1)(已下线)第01讲 3.1椭圆(12大题型训练,含焦点三角形、离心率等题)-【练透核心考点】2023-2024学年高二数学上学期重点题型方法与技巧(人教A版2019选择性必修第一册)黑龙江省大庆市大庆中学2023-2024学年高二下学期开学考试数学试题
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9 . 已知椭圆
的左、右焦点分别为
,
,圆
,点P为椭圆C上一点,若
的最小值为6,则椭圆的离心率为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3152a355ff965ece63bb4bf854aeb84.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/279cf037e45b02cba9b2f895065a709f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e69e8a76f09a70cefe82a01cbaf0a84.png)
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2023-07-12更新
|
618次组卷
|
2卷引用:河南省安阳市滑县2022-2023学年高二下学期期末数学试题
10 . 已知椭圆
的左、右焦点分别是
,
,
是椭圆
上一点,且
(
为坐标原点),则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c83dc94d97a362557f847c4fb002771.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41865347f127e1822f0337b523fb9cd4.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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71b75b071b21f95200d37e8a66e5bc9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c83dc94d97a362557f847c4fb002771.png)
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