作业帮(10-2/55*1)+(9-2/55*2)+(8-2/55*3)+...+(1-2/55*10)=
来源：学生作业帮助网 编辑：作业帮 时间：2024/05/12 04:05:25
(10-2/55*1)+(9-2/55*2)+(8-2/55*3)+...+(1-2/55*10)=
(10-2/55*1)+(9-2/55*2)+(8-2/55*3)+...+(1-2/55*10)=
(10-2/55*1)+(9-2/55*2)+(8-2/55*3)+...+(1-2/55*10)=
(10-2/55*1)+(9-2/55*2)+(8-2/55*3)+...+(1-2/55*10)
= (10+9+8+…+1)-2/55*(1+2+3+…10)
= (1-2/55)*(1+2+3+…10)
=53/55*55
=53