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已知数列{an}满足,,n∈N×.(1)令bn=an+1-an,证明:{bn}是等比数列;...
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已知数列{a
n}满足,
,n∈N
×.
(1)令b
n=a
n+1-a
n,证明:{b
n}是等比数列;
(2)求{a
n}的通项公式.
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