设数列an满足a1=1/2,2nan+1=(n+1)an,求数列an的通项公式

设数列｛an｝满足a1+2a2+3a3+.+nan=n(n+1)(n+2)求通项an 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 设数列an满足a1=1/2,2nan+1=(n+1)an,求数列an的通项公式 高二数列题：设数列{an}满足an+1=an^2-nan+1,n为正整数,当a1>=3时,证明……设数列{an}满足an+1=an^2-nan+1,n为正整数,当a1>=3时,证明(2)1/(1+a1) + 1/(1+a2) + ……+1/(1+an) =< 1/2 设数列an满足:a（n+1）=an^2-(nan）+1,且a1=2,求an的一个通项 设数列{an}满足a1=,an+1-an=3*2的2n-1 求数列{an通项公式 令bn=nan.求数列{bn}的前n项和 已知数列{an}满足A1=2,An+1=An - 1/n(n+1) (1)求数列an的通项公式 (2)设{Bn}=nAn*2^n,求数列Bn前n项和SnRT已知数列{an}满足A1=2,An+1=An - 1/n(n+1) (1)求数列an的通项公式(2)设{Bn}=nAn*2^n,求数列Bn前n项和Sn是A（n+1） 设数列an满足a1+2a2+3a3+.+nan=2^n 1求数列a的通项 2设bn=n^2an 求数列的前n项和Sn求大神帮助 若数列{an}满足a1+2a2+3a3+~~+nan=n(n+1)(2n+1),则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 设数列{an}满足a1=2,a(n+1)-an=3*2^2n-11)求数列{an}的通项公式2）令bn=nan,求数列{bn}前n项和Sn 高二数列题：设数列{an}满足an+1=an^2-nan+1,n为正整数,当a1>=3时,证明……设数列{an}满足an+1=an^2-nan+1,n为正整数,当a1>=3时,证明（1）an>=n+2(2)1/(1+a1) + 1/(1+a2) + ……+1/(1+an) =< 1/2 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? 已知等比数列an满足a1=3,q=2,n属于N 1,数列an通项公式 2,设已知等比数列an满足a1=3,q=2,n属于N1,数列an通项公式2,设数列bn中,bn=nan,求数列bn的前n项的个sn 问道数列题.设数列an满足a1+2a2+3a3+...+nan=2^n(n属于正自然数）,则数列an的通项是? 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.