1⼀1x2+1⼀2x3+1⼀3x4+……+1⼀98x99+1⼀99x100=……

2024-12-20 20:54:12
推荐回答(1个)
回答1:

=(1-1/2)+(1/2-1/3)+(1/3+1/4)+···+(1/98-1/99)+(1/99-1/100)
=1-1/2+1/2-1/3+1/3-1/3+···-1/99+1/99-1/100
=1+0+0+···+0-1/100
=99/100
【OVER~这行不用抄】
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ps:答案不够1,所以一分不给?