若数列{an}满足a1=1,Sn+1=2an+Sn,(n∈N*)则前8项的和S8
若数列an满足:a1=1,Sn-1=2an+Sn(n∈N+),求an前8项和S8
已知数列{an}满足a1=1,an+1=Sn+(n+1)(n∈N*),其中Sn为{an}的前n项和,
设数列{an}的前n项和为Sn,若a1=1,Sn=2an+Sn+(n∈N+),则a6=
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
已知数列{an}的前n项和满足a1=1/2,an=-Sn*S(n-1),(n大于或等于2),求an,Sn
数列{an}中,a1=1,当n大于等于2时,其前n项的和Sn,满足Sn的平方=an(Sn-1)
已知数列an的前n项和为sn,且满足sn=n²an-n²(n-1),a1=1/2
数列{an}的前n项和为Sn,a1=1,an+1=2Sn(n∈N*)
已知数列an首相a1=3,通项an和前n项和SN之间满足2an=Sn*Sn-1(n大于等于2)
设Sn是数列an的前n项和,已知a1=1,an=-Sn*Sn-1,(n大于等于2),则Sn=
已知数列{an}的前n项和为Sn,a1=-23,Sn+1Sn=an-2(n≥2,n∈N)
数列{an}的首项a1=1,前n项和Sn与an之间满足an=2Sn^2/2Sn -1 (n>=2)