已知F1,F2是双曲线C:x2/a2+y2/b2=1(a>0,b>0)的左右焦点,F1F2的绝对值=

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已知F1,F2是双曲线C:x2/a2+y2/b2=1(a>0,b>0)的左右焦点,F1F2的绝对值=
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