如图所示,抛物线C1:x2=4y在点A,B处的切线垂直相交于点P,直线AB与椭圆,C2:
相交于C,D两点.
![](https://img.xkw.com/dksih/QBM/2015/3/18/1572016397500416/1572016403546112/STEM/30dfc3473a484b378f141ac47d83f32b.png)
(Ⅰ)求抛物线C1的焦点F与椭圆C2的左焦点F1的距离;
(Ⅱ)设点P到直线AB的距离为d,是否存在直线AB,使得|AB|,d,|CD|成等比数列?若存在,求出直线AB的方程;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d80b861ba40387cb2bcd04945f5a371a.png)
![](https://img.xkw.com/dksih/QBM/2015/3/18/1572016397500416/1572016403546112/STEM/30dfc3473a484b378f141ac47d83f32b.png)
(Ⅰ)求抛物线C1的焦点F与椭圆C2的左焦点F1的距离;
(Ⅱ)设点P到直线AB的距离为d,是否存在直线AB,使得|AB|,d,|CD|成等比数列?若存在,求出直线AB的方程;若不存在,请说明理由.
更新时间:2016-12-03 10:18:28
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(Ⅰ)求椭圆
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(1)求抛物线的标准方程;
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