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计算:1/(1*3*5)+1/(3*5*7)+1/(5*7*9)+...+1/(2003*2005*2007)=?
人气:218 ℃ 时间:2020-01-28 18:08:59
解答
1/(2n-1)(2n+1)(2n+3)=1/4[1/(2n-1)(2n+1)-1/(2n+1)(2n+3)]
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