高二数列题:设数列{an}满足an+1=an^2-nan+1,n为正整数,当a1>=3时,证明……
设数列{an}满足an+1=an^2-nan+1,n为正整数,当a1>=3时,证明
(1)an>=n+2
(2)1/(1+a1)+1/(1+a2)+……+1/(1+an)=
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