已知点
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102429881977458/SYS201311031024298819774019_ST/0.png)
是离心率为
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102429881977458/SYS201311031024298819774019_ST/1.png)
的椭圆C:
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102429881977458/SYS201311031024298819774019_ST/2.png)
上的一点.斜率为
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102429881977458/SYS201311031024298819774019_ST/3.png)
的直线BD交椭圆C于B、D两点,且A、B、D三点不重合.
(Ⅰ)求椭圆C的方程;
(Ⅱ)△ABD的面积是否存在最大值?若存在,求出这个最大值;若不存在,请说明理由?
考点分析:
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