1/1*2+1/2*3+1/3*4~+1/98*99+1/99*100 *=乘以
来源：学生作业帮助网 编辑：六六作业网 时间：2024/05/17 04:41:10
1/1*2+1/2*3+1/3*4~+1/98*99+1/99*100*=乘以1/1*2+1/2*3+1/3*4~+1/98*99+1/99*100*=乘以1/1*2+1/2*3+1/3*4~+1/9
1/1*2+1/2*3+1/3*4~+1/98*99+1/99*100 *=乘以
1/1*2+1/2*3+1/3*4~+1/98*99+1/99*100 *=乘以
1/1*2+1/2*3+1/3*4~+1/98*99+1/99*100 *=乘以
没加括号吧
是不是 1/(1*2)+1/(2*3) +
=(1/1-1/2)+（1/2-1/3）+
依次类推