设椭圆M:x2a2+y2b2=1(a>b>0)右顶点和上顶点分别为A,B,直线A 发布时间:2017-05-01 03:47 │ 来源:www.tikuol.com 题型:填空题 问题: 设椭圆M:x2a2+y2b2=1(a>b>0)右顶点和上顶点分别为A,B,直线AB与直线y=-x相交于点P,若点P在抛物线y2=-ax上,则椭圆M的离心率等于______.
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