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1/2+5/6+11/12+19/20+29/30+……+9899/9900
人气:360 ℃ 时间:2019-10-19 06:15:29
解答
1/2+5/6+11/12+19/20+29/30+……+9899/9900 =99-(1/2+1/6+1/12+1/20+1/30+……+1/9900)=99-(1-1/2+1/2-1/3+1/3-1/4+1/4-1/5+1/5-1/6+……+1/99-1/100)=99-(1-1/100)=98.01
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