数列an满足a1=1/2,nan+1(下标)-(n+1)an=n^2+n,求数列an/n的前n项和n+1是下标

已知数列{an}满足An+1=2^nAn,且A1=1,则通项an 已知数列an满足an+1=nan,a1=2,求an通项 若数列{an}满足a1+2a2+3a3+~~+nan=n(n+1)(2n+1),则an= 设数列｛an｝满足a1+2a2+3a3+.+nan=n(n+1)(n+2)求通项an 数列An 满足 a1+2a2+3a3+.+nan=n(n+1)(n+2) 求an 数列an满足a1+2a2+3a3+...+nan=n(n+1)(n+2) 求通项an急,谢谢解惑 已知数列｛an｝满足a1=1,a（n+1）=nan n+1是角标 若数列an满足a1=1,an+1=2^nan...若数列an满足a1=1,a（n+1）=2^n·an,则数列an的通项公式? 已知数列{an}满足a1=1,an+1=nan,则数列的通向公式是什么 设数列an满足a1=1/2,2nan+1=(n+1)an,求数列an的通项公式 已知数列{An}满足：A1=1,An=nAn-1+(n-1)!(n>=2),求数列{An}的通项公式. 数列{An｝满足a1=2,an+1=2an+3,求数列{nAn｝的前n项和Sn 数列{an}中,a1=2,且(n+1)an+1=nan,则通项an=? 数列An中,a1=3,nAn+1=(n+2)An,求通项an, 数列an满足an+1-an=3*2^2n-1 a1=2 求an通项bn=nan求bn通项公式 已知数列{an}满足a1+2a2+3a3+…+nan=n(n+1)(n+2),则a1+a2+a3+…+an=多少? 已知数列{an}满足a1+2a2+3a3+...+nan=n(n+1)(2n+1),则该数列an=? 已知数列an满足a1+2a2+3a3+...+nan=n(n+1)*(n+2),则数列an的前n项和Sn=?