求log2(1/125)·log3(1/32)·log5(1/3)

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求log2(1/125)·log3(1/32)·log5(1/3)

求log2(1/125)·log3(1/32)·log5(1/3)
求log2(1/125)·log3(1/32)·log5(1/3)

求log2(1/125)·log3(1/32)·log5(1/3)
log2(1/125)·log3(1/32)·log5(1/3)
=[log2(1)-log2(125)].[log3(1)-log3(32)].[log3(1)-log5(3)]
=-log2(5)^3.log5(3).log3(2)^5
=-15 log2(5).log3(2).log5(3)
=-15 (lg5/lg2).(lg2/lg3).(lg3/lg5)
=-15