1+1\(1+2)+1\(1+2+3)+1\(1+2+3+4)+……1\(1+2+3+……2010)
1+1\(1+2)+1\(1+2+3)+1\(1+2+3+4)+……1\(1+2+3+……2010)
(1/1+2)+(1/1+2+3)+(1/1+2+3+4)+………+(1/1+2+3+………+100)
(1/2+1/3+……+1/1997)(1+1/2+……+1/1996)-(1+1/2+……+1/1997)(1/2+1
1、(1/2+1/3+……1/1007)*(1+1/2+……1/2006)-(1+1/2+……+1/2007)*(1/2
计算:(1-1/2)(1/3-1)(1-1/4)(1/5-1)……(1-1/2010)(1/2011-1)
用简便算法计算:(1-1/2-1/3-1/4-…-1/2010)×(1/2+1/3+1/4+…+1/2010)-(1-1
初中计算题,难(1-1/2-1/3-……-1/2008)*(1/2+1/3+1/4+……+1/2009)-(1-1/2-
计算:(1/2+1/3+……+1/2006)(1+1/2+1/3+……+1/2005)-
(1/2+1/3+1/4+…+2002)*(1+1/2+1/3+1/4+…1/2001)-
(1+1/2+1/3+……+1/60)+(2/3+2/4+……+3/60)+……+(58/59+58/60)+1/60
1/(1+2) + 1/(1+2+3) + 1/(1+2+3+4)……+1/(1+2+3+4+……+99+100)=(
(1-1/2)*(1-1/3)*(1-1/4)*……*(1-1/100)