设数列An的前n项和为Sn,且a1=1,An+1=1/3Sn,
设数列An的前n项和为Sn,且a1=1,An+1=1/3Sn,
已知数列{an}a1=2前n项和为Sn 且满足Sn Sn-1=3an 求数列{an}的通项公式an
设数列{an}的前n项和为Sn,已知首项a1=3,且Sn+1+Sn=2an+1,试求此数列的通项公式an及前n项和Sn
已知数列{an}的前n项和为Sn,且a1=1,an+1=1/3Sn,
设数列an的前n项和为Sn,已知S1=1,Sn+1/Sn=n+c/n,且a1,a2,a3成等差数列
数列an的前n项和为Sn.且满足a1=1.2Sn=(n+1)an
设数列An的前n项和为Sn,已知a1=1,An+1=Sn+3n+1求证数列{An+3}是等比数列
设数列an的前n项和为sn,且a1为1 ,Sn+1=4an+2(n∈N正)
设数列an的前n项和为Sn,已知a1=1,Sn+1=4an+2
设数列{an}的前n项和为Sn,已知a1=a,an+1=Sn
设数列an的前n项和为Sn,a1=1,an=(Sn/n)+2(n-1)(n∈N*) 求证:数列an为等差数列,
已知数列{an}的前N项和为Sn 且an+1=Sn-n+3,a1=2,设Bn=n/Sn-n+2前N项和为Tn 求证Tn