(-1x1/2)+(-1/2x1/3)+(-1/3x1/4)+...+(-1/2013x1/2014)

分类: 作业答案 • 2022-03-05 23:08:49

问题描述：

答

答：
(-1x1/2)+(-1/2x1/3)+(-1/3x1/4)+...+(-1/2013x1/2014)
=1/2-1+1/3-1/2+1/4-1/3+.+1/2014-1/2013
=-1+1/2014
=-2013/2014