(1/1×2)+(1/2×3)+(1/3×4)+…+(1/2010×2011)+(1/2012×2013)的值.(提示:1/1×2=1-1/2;1/2×3=1/2-1/3)

问题描述:

(1/1×2)+(1/2×3)+(1/3×4)+…+(1/2010×2011)+(1/2012×2013)的值.(提示:1/1×2=1-1/2;1/2×3=1/2-1/3)

很久没做数学题了……格式你自己写
=(1-1/2)+(1/2-1/3)+(1/3-1/4)……+(1/2012-1/2013)
=1-1/2013
=2012/2013那倒是采纳啊……晕