已知椭圆
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102640452563663/SYS201311031026404525636019_ST/0.png)
过点
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102640452563663/SYS201311031026404525636019_ST/1.png)
,且离心率e=
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102640452563663/SYS201311031026404525636019_ST/2.png)
.
(Ⅰ)求椭圆方程;
(Ⅱ)若直线l:y=kx+m(k≠0)与椭圆交于不同的两点M、N,且线段MN的垂直平分线过定点
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102640452563663/SYS201311031026404525636019_ST/3.png)
,求k的取值范围.
考点分析:
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