题目

已知等比数列{an}满足an>0(n∈N*),且a5a2n-5=22n(n≥3),则当n≥1时,log2a1+log2a3+log2a5+…+log2a2n-1等于(　　) (A)(n+1)2   (B)n2 (C)n(2n-1)  (D)(n-1)2 答案：B

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