设数列{an}的前n项和是Sn,Sn满足：S1=a(a≠0),Sn+1 =3Sn+1(n∈N*),数列{bn}满足：bn+2 =2bn+1-bn,且_其他解答 - 作业小助手

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设数列{an}的前n项和是Sn,Sn满足：S1=a(a≠0),Sn+1 =3Sn+1(n∈N*),数列{bn}满足：bn+2 =2bn+1-bn,且

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