1+(1/2-1)+(1/3-1/2)+(1/4-1/3)+(1/5-1/4)+…+(1/2009-1/2008)+(1

1-1/1*2-1/2*3-1/3*4-1/4*5……-1/2008*2009的值 1+(1/2-1)+(1/3-1/2)+(1/4-1/3)+(1/5-1/4)+…+(1/2009-1/2008)+(1 | 1/3 - 1/2 | + | 1/4 - 1/3 | + | 1/5 - 1/4 | …… + | 1/2009 计算:|1/2-1|+|1/3-1/2|+|1/4-1/3|+...+|1/2009-1/2008| （-1*1/2)+(-1/2*1/3)+(-1/3*1/4)+.+(-1/2008*1/2009)+(-1/2009*1 ｜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）+…+（-1/2008×1/2009） (1-1/2)(1/3-1)(1-1/4)(1/5-1)``````(1/2009)(11/2010) 1.|1/3-1/2|+|1/4-1/3|+|1/5-1/4|+...+|1/2009-1/2008|= 求 1/2+1/(2*3)+1/(3*4)+1/(4*5)+……+1/(2008*2009)的值 计算:|1/2-1|+|1/3-1/2|+|1/4-1/3|+...+|1/2008-1/2007|+|1/2009-1 |1/3+(-1/2)|+|1/4+(-1/3)|+|1/5+(-1/4)|+……+|1/2010+(-1/2009)|