问题描述:
2减2的平方,减2的立方,减2的4次方,再减…(按这样减下去),再减2的19次方,最后加2的20次方
(1/50-1)*(1/49-1)*(1/48-1)*…*(1/4-1)*(1/3-1)*(1/2-1)
(1/50-1)*(1/49-1)*(1/48-1)*…*(1/4-1)*(1/3-1)*(1/2-1)
问题解答:
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