(1)当n=1有s1=a1=3/2(a1-1) ==> a1=3
n>1有an=Sn-Sn-1 = 3/2 (an - 1) - 3/2 (an-1 - 1) ==>an=3*an-1 公比3的等比数列
=>an = 3^n
(2)bn=1/4b(n-1)-3/4
=>4bn=b(n-1)-3
数列满足前N项和为Sn,且Sn=3/2(an-1),bn=1/4bn-1-3/4(n大于等于2)且b1=3求An,Bn通
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