已知椭圆
与直线y=
x-2
相切,设椭圆的上顶点为M,
是椭圆的左右焦点,且⊿M
为等腰直角三角形.(1)求椭圆的标准方程;(2)直线l过点N(0,-
)交椭圆于A,B两点,直线MA、MB分别与椭圆的短轴为直径的圆交于S,T两点,求证:O、S、T三点共线.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48da128547c4cf9745e8e4b99988a3db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5989c84e320b504511f23eeb6e7357.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d2a97987f71835f519b462f5b8f5957.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/643ef7d761de0e794fc39937dc72ac6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf31876698721a199c7c53c6b320aa86.png)
更新时间:2018-04-11 19:26:33
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【推荐1】已知椭圆的中心是坐标原点
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【推荐2】已知椭圆的中心在原点,一个焦点F1(0,-2
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解题方法
【推荐1】已知椭圆C:
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(1)求椭圆C的标准方程.
(2)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dd54b9df3402ad91e2d34c40efe0c7a.png)
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(1)求椭圆C的标准方程.
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
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【推荐2】已知椭圆
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(1)求椭圆C的方程;
(2)若直线l的斜率大于
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
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