如果你写的是1/(2*4)+1/(4*6)+……+1/(2012*2014) =[1-(1/2)+(1/2)-(1/3)+……+(1/1006)-(1/1007)]/4=[1-(1/1007)]/4=503/2014 追问:我想要个完整的答案
2×4/1+4×6/1+6×8/1+...+2012×2013/1=谢谢了,大神帮忙啊
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