计算题(2017年江苏省淮安市)

1/12+1/20+1/30+······+1/9900

答案解析

1/12+1/20+1/30+······+1/9900=(1/3-1/4)+(1/4-1/5)+(1/5-1/6)+······+(1/99-1/100)=1/3-1/4+1/4-1/5+1/5-1...

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