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(1/50-1)×(1/49-1)×(1/48-1)×···×(1/4-1)×(1/3-1)等于多少?

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(1/50-1)×(1/49-1)×(1/48-1)×···×(1/4-1)×(1/3-1)等于多少?
(1/50-1)×(1/49-1)×(1/48-1)×···×(1/4-1)×(1/3-1)等于多少?
(1/50-1)×(1/49-1)×(1/48-1)×···×(1/4-1)×(1/3-1)
=(49/50)×(48/49)×(47/48)×···×(3/4)×(2/3)
=2/50=1/25