1+1/(1+2)+1/(1+2+3)+1/(1+2+3+4)+1/(1+2+3+4+5).+1/(1+2+3+4+5.+100)
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/02 01:10:09
![1+1/(1+2)+1/(1+2+3)+1/(1+2+3+4)+1/(1+2+3+4+5).+1/(1+2+3+4+5.+100)](/uploads/image/z/3775924-28-4.jpg?t=1%2B1%2F%281%2B2%29%2B1%2F%281%2B2%2B3%29%2B1%2F%281%2B2%2B3%2B4%29%2B1%2F%281%2B2%2B3%2B4%2B5%29.%2B1%2F%281%2B2%2B3%2B4%2B5.%2B100%29)
1+1/(1+2)+1/(1+2+3)+1/(1+2+3+4)+1/(1+2+3+4+5).+1/(1+2+3+4+5.+100)
1+1/(1+2)+1/(1+2+3)+1/(1+2+3+4)+1/(1+2+3+4+5).+1/(1+2+3+4+5.+100)
1+1/(1+2)+1/(1+2+3)+1/(1+2+3+4)+1/(1+2+3+4+5).+1/(1+2+3+4+5.+100)
提示一下,1+2+3+…+n=n(n+1)/2