帮帮做 |-1+1/2|+|-1/2+1/3|+|-1/3+1/4|+.+|-1/9+1/10|=___

来源:学生作业帮助网 编辑:作业帮 时间:2024/05/12 14:10:27

帮帮做 |-1+1/2|+|-1/2+1/3|+|-1/3+1/4|+.+|-1/9+1/10|=___
帮帮做 |-1+1/2|+|-1/2+1/3|+|-1/3+1/4|+.+|-1/9+1/10|=___

帮帮做 |-1+1/2|+|-1/2+1/3|+|-1/3+1/4|+.+|-1/9+1/10|=___
|-1+1/2|+|-1/2+1/3|+|-1/3+1/4|+.+|-1/9+1/10|
=(1-1/2)+(1/2-1/3)+(1/3-1/4)+.+(1/9-1/10)
=1-1/10
=9/10