1/1x2+1/2x3+1/3x4+……+1/9x1o= 1/1x2-1/2x3-1/3x4……-1/1x2+1/2x3+1/3x4+……+1/9x1o=1/1x2-1/2x3-1/3x4……-1/9x10=

分类: 作业答案 • 2021-12-20 05:42:06

问题描述：

1/1x2+1/2x3+1/3x4+……+1/9x1o= 1/1x2-1/2x3-1/3x4……-
1/1x2+1/2x3+1/3x4+……+1/9x1o=
1/1x2-1/2x3-1/3x4……-1/9x10=

答