(1/50-1)(1/49-1)(1/48-1)...(1/4-1)(1/3-1)(1/2-1)计算它的积.

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(1/50-1)(1/49-1)(1/48-1)...(1/4-1)(1/3-1)(1/2-1)计算它的积.
(1/50-1)(1/49-1)(1/48-1)...(1/4-1)(1/3-1)(1/2-1)
计算它的积.

(1/50-1)(1/49-1)(1/48-1)...(1/4-1)(1/3-1)(1/2-1)计算它的积.
(1/50-1)(1/49-1)(1/48-1)……(1/4-1)(1/3-1)(1/2-1)
=(-49/50)×(-48/49)×(-47/48)×……×(-3/4)×(-2/3)×(-1/2)
=-1/50
共有49个负分数相乘,积为负数;约分后,剩下第一个分数的分母50和最后一个分数的分子1

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