1/1*2+1/2*3+1/3*4+.+1/99*100
=(1-1/2)+(1/2-1/3)+(1/3-1/4)+...+(1/99-1/100)
=11-1/2+1/2-1/3+1/3-1/4+...+1/99-1/100
=1-1/100
=99/100
1/1*2+1/2*3+1/3*4+.+1/99*100等于多少?
1/1*2+1/2*3+1/3*4+.+1/99*100等于多少?
说明:*代表乘号
说明:*代表乘号
数学人气:670 ℃时间:2019-10-17 17:53:28
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