|1/3-1/2|+|1/4-1/3|+...+|1/2010-1/2009|
(1-1/2)(1/3-1)(1-1/4)(1/5-1)``````(1/2009)(11/2010)
|1/2-1|+|1/3-1/2|+1/4-1/3|+...|1/2009-1/2008|+|1/2010-1/2009
(-1*1/2) (-1/2*1/3) (-1/3*1/4) .(-1/2009*1/2010) (-1/2010*1/
计算(1-1/2)^2*(1-1/3)^2*(1-1/4)^2*...*(1-1/2009)^2*(1-1/2010)^
-1+2-3+4...-99+100 1/1×2+1/2×3+1/3×4+...+1/2009×2010+1/2010×
|1/3-1/2|+|1/4-1/3|+...+|1/2010-1/2009|
(2011/1-1)(2010/1-1)(2009/1-1)…(3/1-1)(2/1-1)
(1/2010-1)*(1/2009-1)*(1/2008-1)*...*(1/3-1)*(1/2-1)
"1*2/1+2*3/1+3*4/1+.+2007*2008/1+2008*2009/1+2009*2010/1"这道题
(-1)+-2+(-3)+4+(-5)+...+(-2009)+2010
|1/2011-1/2010|+|1/2011-1/2009|+|1/2009-1/2008|+...+|1/3-1/2
1-1/2-1/3-1/4-.1/2009-1/2010=?