1.已知数列满足a1=1,A(n-1)+2An=2,求An的通项公式.2.已知Sn为数列{An}的前n项和,且Sn=2-2An(n属于N*)(1).求证:数列{An}为等比数列.(2)求数列{An}的通项公式.(3)求数列{AnSn}的前n项和.
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