已知非常数列{an}满足a1=a2=1,anSn+1=an(Sn-an)+2(an+1)^2(n>=2),则lim[(Sn)+1]/(Sn+1)=?答案为8/5

问题描述:

已知非常数列{an}满足a1=a2=1,anSn+1=an(Sn-an)+2(an+1)^2(n>=2),则lim[(Sn)+1]/(Sn+1)=?
答案为8/5