数列x1,x2...Xn.满足x=1/3 x( n+1)= xn^2+ xn 则1/(x1+1)+1/(x2+1)+.+
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数列x1,x2...Xn.满足x=1/3 x( n+1)= xn^2+ xn 则1/(x1+1)+1/(x2+1)+.+1/( x2013+1)的整数部分是.没有积分但一定采纳最佳答案
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