1 . 已知椭圆
,
是其左右焦点,
为其左右顶点,
为其上下顶点,若
,
.
(Ⅰ)求椭圆
的方程;
(Ⅱ)过
分别作
轴的垂线
,椭圆
的一条切线
,
与
交于二点,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/851a5d6ec23256f9b4a9e98aa92945fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00442d96d695db2c58bf1fb7165fca94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04d468be20b4d43f5de75416de20e8ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/840cc2b96a1cf6b6c07b6d0abf6156a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fee997b886b20a2a6cfaa9ac89bd7ea.png)
(Ⅰ)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(Ⅱ)过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00442d96d695db2c58bf1fb7165fca94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44434b647ec546fe787e2164e0be6cd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/becdcb8a871e8965853acf0687034c28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44434b647ec546fe787e2164e0be6cd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d01908df4766f2b639266c2f7c913791.png)
您最近一年使用:0次
2018-09-28更新
|
2519次组卷
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4卷引用:【市级联考】广东省珠海市2019届高三9月摸底考试数学理试题
【市级联考】广东省珠海市2019届高三9月摸底考试数学理试题【区级联考】天津市南开区2018~2019学年度高三第二学期基础训练数学 (文)试题【区级联考】天津市南开区2019届高三基础训练数学(理)试题(已下线)专题07 解析几何中的证明问题(第五篇)-备战2020年高考数学大题精做之解答题题型全覆盖
10-11高三上·广东深圳·期中
2 . 已知椭圆的中心在原点,焦点在
轴上,长轴长是短轴长的2倍且经过点
,平行于
的直线
在
轴上的截距为
,
交椭圆于
两个不同点.
(1)求椭圆的标准方程以及
的取值范围;
(2)求证直线
与
轴始终围成一个等腰三角形.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85d23fc512ad69a2d5919ce690407704.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87484a879f450ab097f720fb2a0f4a2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
(1)求椭圆的标准方程以及
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)求证直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03df57efff473b3cfeb8503796b7d6b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
您最近一年使用:0次
2017-08-20更新
|
577次组卷
|
7卷引用:2011届广东省深圳高级中学高三上学期期中考试数学理卷
(已下线)2011届广东省深圳高级中学高三上学期期中考试数学理卷(已下线)2013届云南玉溪一中高三上学期期中考试文科数学试卷(已下线)2010-2011年江西省鄱阳县油墩街中学高二下学期期中考试理科数学(已下线)2010-2011学年重庆市“名校联盟”高二第一次联考文科数学试卷(已下线)2012-2013学年山东省济宁市汶上一中高二12月质检理科数学试卷江西省新余市2016-2017学年高二下学期期末质量检测数学(理)试题湖北省恩施州2019-2020学年高二上学期期末数学(理)试题
3 . 椭圆![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf7932097ca6c88b67272d979845a56a.png)
(
)的左焦点为
,右焦点为
,离心率
.设动直线![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a461995b90655f5133df6f61c2d09bd.png)
与椭圆
相切于点
且交直线
于点
,
的周长为
.
(1)求椭圆
的方程;
(2)求两焦点
、
到切线
的距离之积;
(3)求证:以
为直径的圆恒过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf7932097ca6c88b67272d979845a56a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7aea48c44781a844b5c19191f70f61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9374d3462754e846cbb0f7dd5fd28277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7aac1391edae471b8d48d2d70d17f466.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/195a7dca9e2f7e7f29b46b22b17d7772.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/075ba8c6fb5ef7288cd3fed425c8e69e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a461995b90655f5133df6f61c2d09bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15b256345d7109e081b7c895591e995d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33ebbd866e455cf80ea669c9f56f792c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ab653ffa6acf8b28096ff54719579d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ea658f3a9359f5740d5aab48f7948.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f92c0005348ac35069a9fd56068da81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d92d82518650aaf4fb0a612e70140864.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a36c4b89816a1145451dd44a1e1b313.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33ebbd866e455cf80ea669c9f56f792c.png)
(2)求两焦点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7aac1391edae471b8d48d2d70d17f466.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/195a7dca9e2f7e7f29b46b22b17d7772.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
(3)求证:以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ba53bcb8237dfd0c0cc7b3c398000e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/195a7dca9e2f7e7f29b46b22b17d7772.png)
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