设Sn是数列{an}前n项和,Sn=3/2an—3/2,又数列{Bn}的通项公式为bn=4n=3,求{an}的通项公式

问题描述:

设Sn是数列{an}前n项和,Sn=3/2an—3/2,又数列{Bn}的通项公式为bn=4n=3,求{an}的通项公式

A1 = S1 = 3/2(A1-1),A1 = 3
An= Sn - Sn-1 = 3/2(An-An-1),
An = 3An-1
{an}的通项公式
An = 3^n