已知数列{an},其前n项和为Sn=3/2n2+7/2n﹙n∈N*﹚.
设数列{an}前n项和为Sn,数列{Sn}的前n项和为Tn,满足Tn=2Sn-n2,n∈N*.
已知数列{an}的前n项和为Sn,且Sn=2n2+n,n∈N*,数列{bn}满足an=4log2bn+3,n∈N*.
已知:数列{an}的前n项和Sn=n2+2n(n∈N*)
已知数列{an}的通项公式an=log2[(n+1)/(n+2)](n∈N),设其前n项的和为Sn,则使Sn
已知数列{an}前n项和为sn=3n^2-n,求证其为等差数列
已知数列{an}的前n项和为Sn,满足Sn=2an+n2-4n(n=1,2,3,…).
已知数列{An},Sn是其前n项和,且满足3An=2Sn+n,n为正整数,求证数列{An+1/2}为等比数列
已知数列{an}的前n项和为Sn=3n^2-5n/2(n属于N*)
已知数列{an}的前n项和Sn=25n-2n2.
已知数列{an}的前n项和Sn=n2+2n.
已知数列{an}的前n项和,Sn=n2+2n+1.
已知数列{a(n)}Sn是其前n项的和,且满足3an=2Sn+n(n∈N※)