设数列〔an〕满足a1=1,a2=5/3(3分之5）,an+2=5/3an+1－2/3an,(n属于N※）.（1）令bn=an+1－an,(n属于N※）,求数列（bn）的通项公式.（2）求数列{nan}的前n项和Sn

设数列AN满足A1等于1,3(A1+a2+~+AN)=(n+2)an,求通向公式 设数列{an}满足lg(1+a1+a2+...+an)=n+1,求通项公式an 设数列〔an〕满足a1=1,a2=5/3(5分之3）,an+2=5/3an+1－2/3an.求an 设数列｛an｝满足a1+2a2+3a3+.+nan=n(n+1)(n+2)求通项an 设数列【an】满足a1=1,3（a1+a2+a3+······+an）=（n+2）an,求通项an 设数列{An}满足A1+3A2+3²A3+…+3n-1An=3/n.(1)求数列{An}的通项. 设数列｛an｝满足a1+3a2+3平方a3+...+3n-1an=n/3,n属于N*.求数列｛an｝的通项公式? 设数列an满足a1+3a2+3²a3+…+3^n-1(an)=n/3,求数列an的通项公式 数列{An}满足a1=1/2,a1+a2+..+an=n方an,求an 设数列｛An｝满足 A1=6,A2=4 A3=3,且数列{An+1-An}（n属于自然数）是等差数列,球An的通向公式 rt设数列｛An｝满足 A1=6,A2=4 A3=3,且数列{An+1-An}（n属于自然数）是等比数列,球An的通向公式rt 设数列｛an}满足a1+3a2+3^2a3+...+3^n-1an=n/3,求（1）数列{an}的通项公式（2）设bn=n/an求数列bn的前n项 设数列{an}满足a1=1a2=2an=1/3（an-1+2an-2）求an题目为设数列{an}满足a1=1，a2=2，an=1/3（an-1+2an-2）求an 设数列an满足a1+3a2+3²a3+.+3的n-1次方 an=n/3 求an的通项公式 设数列｛an｝满足a1+3a2+3^2a3+...+3^(n-1)an=n/3求an的通项 设数列{An}满足A1+3A2+3²A3+******+3^（n-1）An=n/31、求{An}通项公式 已知数列{an}满足a1=3,(an+1)-3an=3^n(n,n∈N*),数列{bn}满足bn=3^(-n)an求证：数列{bn}是等差数列设sn=(a1)/3+(a2)/4+(a3)/5+.(an)/(n+2),求满足1、128<sn/s2n<1/4的所有正整数n的值 数列{an}满足a1=3/2,an+1=an2-an+1,求证：1/an=1/(an)-1 - 1/(an+1)-1数列{an}满足a1=3/2,an+1=an2-an+1,求证：1/an=1/(an)-1 - 1/(an+1)-1设Sn=1/a1+1/a2+...+1/an,n>2证明1 已知数列{an}满足a1=1,a2=3,an+2=3an+1-2an求an