数列{an}满足Sn+Sn+1=5/3an+1,a1=4求an
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
数列{an} a1=4 Sn+Sn+1=5/3 an+1 求An 那些1都是下标
已知数列{an}满足an+1+an=4n-3 当a1=2时,求Sn
已知数列an满足a1=1/2 sn=n平方×an 求an
已知数列{an},满足a1=1/2,Sn=n²×an,求an
已知数列an满足a1=1,a(n+1)=an/{3(an)+1} Sn=a1a2+a2a3+.+an(an+1),求Sn
数列an,a1=4,Sn+S(n+1)=5/3an+1,an
数列an满足sn=3an-1/2 计算a1,a2,a3,a4 猜an通项 求an前n项和sn
已知数列an前n项和为Sn,且满足a1=4,Sn+Sn+1=5/3an+1
数列{An},A1=1,A(n+1)=3An+4.求An和Sn.
已知数列an,an>0,Sn=a1+a2+a3.+an,且an=6Sn/an + 3,求Sn!
已知数列{an}满足3an+1+an=4,a1=9,前n项和为sn,则满足不等式/sn-n-6/