已知s=[1+(负1/2)]+[1/2+(-1/3)]+[1/3+(-1/4)】+...[1/2014+(-1/2015)],求s

问题描述:

已知s=[1+(负1/2)]+[1/2+(-1/3)]+[1/3+(-1/4)】+...[1/2014+(-1/2015)],求s

答案=1-1/2015