1/1X2+1/2X3+1/3X4+……1/2003X2004 用拆项法解决

分类: 作业答案 • 2022-04-07 00:17:54

问题描述：

答

1/1X2+1/2X3+1/3X4+……1/2003X2004
=1-1/2+1/2-1/3+1/3-1/4+...+1/2003-1/2004
=1-1/2004
=2003/2004