|1/2-1|+|1/3-1/2|+|1/4-1/3|+……+|1/2013-1/2012|
(-1*2/1)+(-1/2*1/3)+(-1/3*1/4)+…+(-1/2012*1/2013)
1/1×2+1/2×3+1/3×4+…+1/2010×2011+1/2012×2013
1/(1-1/2)/(1-1/3)/(1-1/4)/……/(1-1/2012)
2013×(1/1×2+1/2×3+1/3×4+……1/+2011×2012+2012×2013)怎么算?
(-1×1/2)+(-1/2×1/3)+(-1/3×1/4)+…+(-1/2012×1/2013) 求大神指导~
数学课上老师出了一道题,计算(1/2+1/3+1/4+…+1/2013)×(1+1/2+1/3…1/2012)-(1+1
1/2十1/(2+3)十1/(3+4)十1/(4+5)十……1/(2012+2013)
(-1×1/2)+(-1/2×1/3)+(1/3×1/4)+…+(-1/2011×1/2012)+(-1/2012×1/
(1/2014-1)×(1/2013-1)×(1/2012-1)…(1/3-1)(1/2-1)
根据(1)式结果计算:1/1×2+1/2×3+1/3×4+…+1/2012×2013=?
计算:1/1*3+1/2*4+1/3*5+…+1/2011*2013+1/2012*2014
|2分之1-1|+|3分之1-2分之1|+|4分之1-3分之1|+……|2012分之1-2011分之1|+|2013分之