1 . 求已知离心率
,过
点且与直线
相切于点
,长轴平行于y轴的椭圆方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e5bb267505c2a5fc6f9abc02bd43120.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53a948d2f7732d7f03e986c63712089b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a47c0db83f935c93d03e127dc37014ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/766828ae1f2ff8577f35bec7f38bde1f.png)
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2 . 已知椭圆对称中心为坐标原点,对称轴为坐标轴,该椭圆的一焦点坐标为
且过点
,求该椭圆的长轴长为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccc8350b12974ffc8d06fce36d158f02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52ae286ae8a209bc659ace6354b79abf.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
A.![]() | B.![]() |
C.![]() | D.![]() |