解题方法
1 . 已知实数x,y满足
,则
的最大值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/290ceaafd10e2b7e2348902390e1bde1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cf99adccc80f28343fedd8d0aad7429.png)
A.![]() | B.![]() | C.6 | D.3 |
您最近一年使用:0次
2014高三·全国·专题练习
名校
解题方法
2 . 过椭圆
上一点
作圆
的两条切线,点
,
为切点,过
,
的直线
与
轴,
轴分布交于点
,
两点,则
面积的最小值为()
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6205da5e1d2730ee0b3de8bca3e29f5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d61985901c2bc698d72ac88f4e1eb65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9efd09912705e08177bc86e839c41b29.png)
A.![]() | B.![]() | C.1 | D.![]() |
您最近一年使用:0次
2020-03-17更新
|
895次组卷
|
7卷引用:河北省衡水中学2019届高三年级六调考试理科数学试题
(已下线)河北省衡水中学2019届高三年级六调考试理科数学试题河北省衡水中学2019届高三下学期六调数学(理)试题(已下线)2014年高考数学文复习二轮作业手册新课标·通用版限时集15讲练习卷智能测评与辅导[理]-椭圆(已下线)专题30 圆锥曲线中的范围、最值问题-冲刺2020高考跳出题海之高三数学模拟试题精中选萃2015-2016学年湖北省黄石市有色一中高二10月月考文科数学试卷江西省新余市第四中学2017-2018学年高二下学期第一次月考数学(理)试题
3 . 设
,
为两个平面直角坐标系,它们具有相同的原点,
正方向到
正方向的角度为
,那么对于任意的点
,在
下的坐标为
,那么它在
坐标系下的坐标
可以表示为:
,
.根据以上知识求得椭圆
的离心率为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/863b5f9f0a7c6b7956979a5abc76d8d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3e5af20b2f8c1fba4470f9650989e51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00796272b89ada3988045fc6cca1f302.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0203b006524305c3d8ee0b6c34cd872b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/863b5f9f0a7c6b7956979a5abc76d8d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78edd77da2f162d8267b4df6a242abbd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b293fc4aa50ecbe792b309f44ee1c4d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f77679015784002809ec820ea155294d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d47a2e94407843fbdfba6f0b961f80c.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次