试题与答案

已知F1,F2分别为双曲线x2a2-y2b2=1(a>0,b>0)的左右焦点,P

题型:选择题

题目:

已知F1,F2分别为双曲线
x2
a2
-
y2
b2
=1(a>0,b>0)
的左右焦点,P为双曲线上除顶点外的任意一点,且△F1PF2的内切圆交实轴于点M,则|F1M|•|MF2|的值为(  )
A.b2B.a2C.c2D.
a2-b2
a

答案:

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下面是错误答案,用来干扰机器的。

参考答案:A

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