设数列,a1=3,an+1=3an-2,求数列an是等比数列

设数列,a1=3,an+1=3an-2,求数列an是等比数列 设数列{an},a1=3,a(n+1)=3an -2 (1)求证:数列{an-1}为等比数列 设数列AN满足A1等于1,3(A1+a2+~+AN)=(n+2)an,求通向公式 数列an中,a1=3,an+1=an/2an+1,则an=? 设数列{an}中,a1=2,an+1=an+n+1,则通项an=? 设数列an a1=3 3an+1-3an=2 则a100=rt. 设数列﹛an﹜中,a1+4,an=3a(n-1)+2n-1,求通项an 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=1,3（a1+a2+a3+······+an）=（n+2）an,求通项an 数列 (10 18:35:56)设数列{an}满足a1=9,an+1=-1/2an+3,求an的通项公式（含过程） 在数列an中,a1=1,an=3an-1+2则an= 已知数列{an}中,a1=1/2,an+1+3an=0,an=( ) 数列｛an},a1=1,an+1=2an-n^2+3n,求｛an｝. 在数列an中,a1=2 an+1=an+3n则an= 数列｛an｝满足a1=1,且an=an-1+3n-2,求an 在数列{an}中,a1=3,An+1=an^2求an. 数列AN满足A1=2,AN+1=AN^2+6AN+6,设CN=LOG5(AN+3),证｛CN}为等比 设数列{an}中,a1=1且an+1=3an+4,求证{an+2}是等比数列求{an}的前n项和为Sn