A1=1,A(n+1)/An=(n+2)/n,求An?
A1=1,A(n+1)/An=(n+2)/n,求An?
设数列{an}中,a1=2,a(n+1)=an+n+1,求an
数列{an}中,a1=2,a(n+1)=an(n+1)/n,求{an}通项式
已知数列{an}满足a1=33,a(n+1)-an=2n,求an/n的最小值
数列{an},a1=1,an+1=2an-n^2+3n,求{an}.
数列A(n+1)=2An+2n-3,A1=2,求An
An>0,A1=2,当n>=2,An+A(n-1)=n/(An-A(n-1))+2,求An通项
在数列an中,a1=1,且an=(n/(n-1))a(n-1)+2n*3的(n-2)次方 求an通项公式
.感激= 已知数列{an}中,a1=3,an=(2^n)*a(n-1) (n》2,n∈N*)求数列an通项公式
已知在数列{an}中,a1=2,a(n+1)-3a(n)=3n,求an
数列{an},a1=1,a(n+1)=2an-n^2+3n
已知数列{an}中a1=6,且an-an-1=(an-1/n)+n+1(n属于N*,n≥2),求an