设数列an满足a1+3a2+3²a3……+3n-1次方an=n/31.求数列an的通项2.设bn=n/an,求数列bn的前n项和Sn

设数列{An}满足A1+3A2+3²A3+******+3^（n-1）An=n/31、求{An}通项公式 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+a2/2+a3/3+a4/4……+an/n=An+B,其中A、B为常数.数列{an}是否为等差数列? 问道数列题.设数列an满足a1+2a2+3a3+...+nan=2^n(n属于正自然数）,则数列an的通项是? 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 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+a2/2+a3/3+.+an/n=n^2-2n-2,求数列{an}的通项公式 若数列{an}满足a1+3a2+3²a3+···+3^n-1an=(n+1)/3,则an=? 若数列{an}满足a1+3a2+3²a3+···+3^n-1an=n/2 则an= 设数列{an}满足;a1+a2/2+a3/3+...+an/n=n^2-2n-2,求数列{an}的通项公式（a1,a2,a3...an中a后面都是下标） 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+3²a3……+3n-1次方an=n/31.求数列an的通项2.设bn=n/an,求数列bn的前n项和Sn 若等比数列{an}满足:a1+a2+a3+a4+a5=3,a1²+a2²+…a5²=12,则a1-a2+a3-a4+a5=? 设数列{an}满足a1+2a2+3a3+······nan=n^2求数列｛an}的通项公式 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