急求!高一数学题:已知数列{an},a1 = 1 , Sn是前n项和,Sn+1= Sn/( 3+4Sn) n >= 1
急求!高一数学题:已知数列{an},a1 = 1 , Sn是前n项和,Sn+1= Sn/( 3+4Sn) n >= 1
已知数列{an},a1 = 1 ,Sn是前n项和,Sn+1= Sn/( 3+4n) n >= 1 ,求an通项公式
已知数列 an前n项和为Sn,a1=1,Sn=2a(n+1),求Sn
已知数列{an}的前n项和为Sn,且满足Sn=Sn-1/2Sn-1 +1,a1=2,求证{1/Sn}是等差数列
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}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的前n项和为Sn,已知A1=1,An+1=Sn*(n+2)/n,证明数列Sn/n是等比数列
高一数学题1、已知数列an满足a1=4/3,2-a(n+1)=12/(an+6),1/an的前n项和为Sn,求Sn
数列{an}的前n项和为Sn,已知a1+2,Sn+1=Sn-2nSn+1Sn,求an
已知数列{an}的前n项和为Sn,且满足an+2Sn*Sn-1=0,a1=1/2.求证:{1/Sn}是等差数列
已知Sn是数列{An}的前n项和,A1=2,根号Sn—根号S(n-1)=根号2,求Sn的表达式
已知数列an是等差数列,且a1不等于0,Sn为这个数列的前n项和,求limnan/Sn.limSn+Sn-1/Sn+Sn