求1/1*2+1/2*3+1/3*4+.+1/2012*2013的值
2个回答
1/1*2+1/2*3+1/3*4+.+1/2012*2013
=1-1/2+1/2-1/3+……+1/2012-1/2013
=1-1/2013
=2012/2013
相关问题
( -1*1/2)+(-1/2*1/3)+(1/-3*1/4)+…+(-1/2012*1/2013)求过程
请计算1/(2√1+1√2)+1/(3√2+2√3)+∧+1/[(2013√2012)+(2012√2013)]
|1/2-1|+|1/3-1/2|+|1/4-1/3|+……+|1/2013-1/2012|
(1/2+1/3+1/4+……+1/2013)(1+1/2+1/3+1/4+……+1/2012)-(1+1/2+1/3+
(√3+1)∧2013--2(√3+1)∧2012--2(√3+1)∧2011+2013
计算:1/1*2+1/2*3+1/3*4+……+1/2012*2013怎么做?
|1-1/2|+|1/2-1/3|+|1/3-1/4|+|14/-+···+|1/2012-1/2013|+|1/201
已知M=(1+2+3+...+2012)*(2+3+4+...+2013) N=(1+2+3+...+2013)*(2+
(-1×1/2)+(-1/2×1/3)+(-1/3×1/4)+…+(-1/2012×1/2013) 求大神指导~
计算-1/1×2-1/2×3-1/3×4-...-1/2012×2013