等比数列{an} a4×a5=32 求log2(a1)+log2(a2)…+log2(a8)

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等比数列{an}a4×a5=32求log2(a1)+log2(a2)…+log2(a8)等比数列{an}a4×a5=32求log2(a1)+log2(a2)…+log2(a8)等比数列{an}a4×a

等比数列{an} a4×a5=32 求log2(a1)+log2(a2)…+log2(a8)
等比数列{an}
a4×a5=32 求log2(a1)+log2(a2)…+log2(a8)

等比数列{an} a4×a5=32 求log2(a1)+log2(a2)…+log2(a8)
a1a9=a2a7=a3a6=a4a5=32 原式=log2(a1a8)+log2(a2a7)+...=20