1 . 已知直线l过椭圆8x2+9y2=72的一个焦点,斜率为2,l与椭圆相交于M,N两点,则弦MN的长为________ ,MN的垂直平分线方程为________ .
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2 . 若椭圆
与双曲线
在第一象限内有交点
,且双曲线左、右焦点分别是
,
,点
是椭圆上任意一点,则
面积的最大值是_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d33aa9484e9d74d6d7d597095d7404a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9a0bd4bd9985f1e367c100b453ed03f.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33d776753746914c2410a3946c357f35.png)
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2018-02-17更新
|
673次组卷
|
2卷引用:浙江省杭州地区(含周边)重点中学2017-2018学年高二上学期期末考试数学试题
3 . 斜率为1的直线与椭圆
相交于
两点,则
的最大值为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/271e595c257e4c0ade90a9bbbf0e6b0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4dfec890cdfdda355e19463f3be813.png)
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2018-02-15更新
|
877次组卷
|
3卷引用:福建省闽侯县第八中学2017-2018学年高二上学期期末考试数学(文)试题
福建省闽侯县第八中学2017-2018学年高二上学期期末考试数学(文)试题活页作业10-椭圆方程及性质的应用(2018年数学同步优化指导(北师大版选修1-1))(已下线)3.1.2 椭圆(第二课时)(精讲)-2020-2021学年一隅三反系列之高二数学新教材选择性必修第一册(人教A版)
名校
4 . 已知椭圆
,
和
是椭圆的左、右焦点,过
的直线交椭圆于
,
两点,若
的内切圆半径为
,
,
,则椭圆离心率为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00df4f17848c072b51e80d427d486e31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a09a8ac969e5cec3be6abf4ff44c692e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce6758b8b074d33ea9e82818593656e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a09a8ac969e5cec3be6abf4ff44c692e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3f60ec1b15068a5f3921897169ee12c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c19953c8c61bcaf49a4fc1707ef84f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddec92f798aa2a4e3e13d2c65adf20d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30bd74f983ab43034333f5eaac02f80b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ba24660becc23095082d33e69e70010.png)
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2018-02-13更新
|
465次组卷
|
4卷引用:河南省濮阳市2018届高三第一次模拟考试数学(理)试题
河南省濮阳市2018届高三第一次模拟考试数学(理)试题(已下线)2018年高考数学备考中等生百日捷进提升系列(捷进提升篇)专题10 圆锥曲线江苏省宿豫中学2018-2019学年高二上学期期末模拟数学试题【全国百强校】河北省武邑中学2018-2019学年高二上学期期末考试数学(理)试题
名校
解题方法
5 . 已知椭圆
的方程为
,则其长轴长为__________ ;若
为
的右焦点,
为
的上顶点,
为
上位于第一象限内的动点,则四边形
的面积的最大值为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/271e595c257e4c0ade90a9bbbf0e6b0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866ff92b891695983819b7ec023f874d.png)
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2018-02-11更新
|
434次组卷
|
2卷引用:浙江省衢州五校2017-2018学年高二上学期期末联考数学试题
解题方法
6 . 设
为椭圆
的两个焦点,点
在椭圆上,若线段
的中点在
轴上,则
=___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d80b861ba40387cb2bcd04945f5a371a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ac86e1c253297a377e14fb9a1689be8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4ef569668e797b1e94257fd5f4384dd.png)
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解题方法
7 . 设
是椭圆
的右焦点,且椭圆上至少有
个不同的点
,使
,
,
,
组成公差为
的等差数列,则
的取值范围为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e78f1a9cc4dedc05c175ab99b288b9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d07ae0b4264da6a8812454ffd2f20d94.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d13368116c552bc6127e2052b9d3f6d6.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58da39ee2ecf1b57140aa59fd65b82ef.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
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2018高二上·江苏·专题练习
8 . 已知椭圆
的右顶点为
, 点
,过椭圆
上任意一点
作直线
的垂线,垂足为
,则
的最小值为_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/279cefeb5c389a37a71e5fd3925f5954.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e8c4afeb6cf6e4eac6c1044ecb12a2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b66a5b7813e902306477f91f9f4084cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/947c65440c466f73caabf970588c428e.png)
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名校
9 . 过椭圆
的右焦点F作倾斜角为
的直线交椭圆与A,B两点,则线段AB=_________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc603fea876cbf85b1efcb5bab0d500f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af9955b5aebb73cd84447e8541f901ac.png)
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解题方法
10 . 已知P为椭圆
上一点,
是椭圆的焦点,
,则
的面积为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b94ac460f77a9215c0c80517d9e740b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40f98254a6193566587a70c7d95fdabf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/420b5be6c58f15bbbdc306243b6e641a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/002ed1ebb2cb936e10ab478789f91c7c.png)
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