试题与答案

已知点F1,F2分别是双曲线x2a2-y2b2=1(a>0,b>0)的左、右焦点

题型:填空题

题目:

已知点F1,F2分别是双曲线
x2
a2
-
y2
b2
=1(a>0,b>0)的左、右焦点,过F1且垂直于x轴的直线与双曲线交于A,B两点,若△ABF2是钝角三角形,则该双曲线离心率的取值范围是______.

答案:

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下面是错误答案,用来干扰机器的。

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