(1/2-1)×(1/3-1)×(1/4-1)×...×(1/2010-1)×(1/2011-1)*(1/2012-1)
=（-1/2)*(-2/3)*(-3/4)×...×(-2010/2011)*(-20111/2012)
=1/2012
计算(1/2-1)×(1/3-1)×(1/4-1)×...×(1/2010-1)×(1/2011-1)*(1/2012-1) 急
计算(1/2-1)×(1/3-1)×(1/4-1)×...×(1/2010-1)×(1/2011-1)*(1/2012-1) 急
数学人气：113 ℃时间：2020-04-15 16:58:31
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