设数列an满足a1=2,an+1=3n-2(n为正整数)求（1）an+1-1除以an-1是多少,（2）求数列an的通项

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=2,a(n+1)=3an+2^(n-1),求an2,设数列an满足a1=2,a(n+1)=3an+2n,求an 数列｛an｝满足a1=1,且an=an-1+3n-2,求an 设数列｛an｝满足a1+2a2+3a3+.+nan=n(n+1)(n+2)求通项an 数列an满足a1=1/3,Sn=n(2n-1)an,求an 数列{An}满足a1=1/2,a1+a2+..+an=n方an,求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lg(1+a1+a2+...+an)=n+1,求通项公式an 数列{an}满足a1=1 an+1=2n+1an/an+2n 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 设数列an满足a1=2,a(n+1)-an=3x2的2n-1次方,求数列an的通项公式 数列[An]满足a1=2,a（n+1）=3an-2 求an 已知数列{an}满足a1=-1,an=[(3n+3)an+4n+6]/n,bn=3^(n-1)/an+2.求数列an的通向公式.设数列bn是的前n项和已知数列{an}满足a1=-1,an=[(3n+3)an+4n+6]/n,bn=3^(n-1)/an+2.(1)求数列an的通向公式.(2)设数列bn是的前n项和为sn, 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 已知数列{an}满足：a1=3,an+1=（3an-2）/an ,n∈N*．（Ⅰ）证明数列{(an-1)/an-2已知数列{an}满足：a1=3,an+1=（3an-2）/an ,n∈N*．（1）证明数列{(an-1)/an-2 }为等比数列,并求数列{an}的通项公式；（2）设设b 已知数列{an}满足an+1=2an+3.5^n,a1=6.求an 设b＞0,数列an满足a1=b,an=nban-1/an-1+n-1（n≥2）求数列an通向公式. 设b＞0,数列an满足a1=b,an=nban-1/an-1+n-1（n≥2）求数列an通向公式