数列A1=2,nAn+1=(n+1)An+2,求通项
数列An中,a1=3,nAn+1=(n+2)An,求通项an,
数列an满足a1+2a2+3a3+...+nan=(n+1)(n+2) 求通项an
数列A1=2,nAn+1=(n+1)An+2,求通项
设数列{an}满足a1+2a2+3a3+.+nan=n(n+1)(n+2)
a1=1 数列 (n+1)an+1^2-nan^2+an+1an=0 求通项公式
若数列{an}满足a1+2a2+3a3+~~+nan=n(n+1)(2n+1),则an=
已知数列(an)满足a1+2a2+3a3+...+nan=n(n+1)(n+2)求an
在数列{an}中,a1+2a2+3a3+.+nan=n(2n+1)(n属于N)
已知数列{an}满足a1=1/4 , an=an-1/[(-1)nan-1-2] (n≥2,n∈N) (1)求通项公式a
数列an的前n项和Sn,a1=1,a(n+1)(下标)=2Sn.求通项an 求nan的前n项和Tn
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=?
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.