数列A1=2,nAn+1=(n+1)An+2,求通项,nA(n+1)=(n+1)An ) +2不好意思

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中,a1=1,nAn+1=(n+2)An,求通项 数列an.a1=1,a1+2a2+3a3+.+nan=(n+1)/2*an+1求an 两个数列An,Bn且Bn=a1+2a2+.+nan/1+2+.+n 已知数列{an}中,a1=1,(n+1)an+1=nan,则an 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 a1=1 数列 （n+1)an+1^2-nan^2+an+1an=0 求通项公式 已知数列an,若a1=1,nan+1=(n+2)Sn,求证Sn/n为等比数列已知数列an,若a1=1,nan+1=(n+2)Sn,求证数列Sn/n为等比数列,并且求Sn 已知数列｛an｝满足a1=1,a（n+1）=nan n+1是角标 在数列{an}中,a1+2a2+3a3+.+nan=n(2n+1)(n属于N)(1)求数列{an的通项公式;(2)求数列{nan/2^n}的前n项和Tn. 在数列{an}中,a1=2,nan+1=(n+1)an+2,则a10为 数列an中,a1=1/2,an+1=nan/【(n+1)*(nan+1)】,前n项和为Sn1.设bn=1/nan,求证数列bn是等差数列2求Sn的表达式 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.