数列{an}满足1/2a1+1/2^2a2+1/2^3a3……1/2^nan=2n+5.求通项
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数列{an}满足1/2a1+1/2^2a2+1/2^3a3……1/2^nan=2n+5.求通项
数列{an}满足1/2a1+1/2^2a2+1/2^3a3……1/2^nan=2n+5.求通项
数列{an}满足1/2a1+1/2^2a2+1/2^3a3……1/2^nan=2n+5.求通项
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