(1-1/2)(1/3-1)(1-1/4)(1/5-1)``````(1/2009)(11/2010)
(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:|1/3-1/2|+|1/4-3/1|+|1/5-1/4|+.+|1/2010-1/2009|
|1/3+(-1/2)|+|1/4+(-1/3)|+|1/5+(-1/4)|+……+|1/2010+(-1/2009)|
计算|1/3-1/2|+|1/4-1/3|+|1/5-1/4|+...+|1/2010-1/2009|.
计算(1-1/2)^2*(1-1/3)^2*(1-1/4)^2*...*(1-1/2009)^2*(1-1/2010)^
(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)
1/1×2+1/2×3+1/4×5+……+1/2009×2010
(1-1/2)*(1/3-1)*(1-1/4)*(1/5-1)…(1/2009-1)*(1-1/2010)等于多少
(-1)+-2+(-3)+4+(-5)+...+(-2009)+2010