1/1*2+1/2*3+1/3*4+1/4*5+------+1/99*100
来源:学生作业帮 编辑:搜搜做题作业网作业帮 分类:数学作业 时间:2024/07/18 23:20:33
1/1*2+1/2*3+1/3*4+1/4*5+------+1/99*100
要用拆项相消法帮忙看看
要用拆项相消法帮忙看看
![1/1*2+1/2*3+1/3*4+1/4*5+------+1/99*100](/uploads/image/z/19518775-7-5.jpg?t=1%2F1%2A2%2B1%2F2%2A3%2B1%2F3%2A4%2B1%2F4%2A5%2B------%2B1%2F99%2A100)
1/1*2+1/2*3+1/3*4+1/4*5+------+1/99*100
=1-1/2+1/2-1/3+1/4-1/5+……+199-1/100
=1-1/100
=99/100
=1-1/2+1/2-1/3+1/4-1/5+……+199-1/100
=1-1/100
=99/100
1/1*2*3+1/2*3*4+1/3*4*5+...+1/99*100*101
1/1*2*3+1/2*3*4+1/3*4*5+.1/99*100*101
(1+1/1*3)*(1+1/2*4)*(1+1/3*5).(1+1/98*100)*(1+1/99*101)
(1+1/1+3)*(1+1/2*4)*(1+1/3*5)*.*(1+1/98*100)*(1+1/99*101)
1/1×2+1/2×3+1/3×4+1/4×5+.+1/98×99+1/99×100=?
1/1*2+1/2*3+1/3*4+1/4*5+.1/98*99+1/99*100=?
(1-1/2)(1-1/3)(1-1/4).(1-1/99)(1-1/100)等于?
(-1*1\2)+(-1\2*1\3)+(-1\3*1\4)+.+(-1\99*1\100)
1/1*2*3*4+1/2*3*4*5+...+1/97*98*99*100=?
|1/3-1/2|+|1/4-1/3|+|1/5+1/4|+...+|1/100-1/99|=?有谁能解急
计算/1/3-1/2/+/1/4-1/3/+/1/5-1/4/+省略号+/1/100-1/99/
简算|3/1-2/1|+|4/1-3/1|+|5/1-4/1|+...+|100/1-99/1|