等比数列{an}
a4×a5=32 求log2(a1)+log2(a2)…+log2(a8)
人气：419 ℃ 时间：2020-10-01 09:00:24
解答
a1a9=a2a7=a3a6=a4a5=32 原式=log2(a1a8)+log2(a2a7)+...=20
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