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Answers
＝log₂(3×4)-log₂18/log₂4
＝log₂3+log₂4-log₂(3²×2)/log₂2²
＝log₂3+log₂2²-(log₂3²+log₂2)/2
＝log₂3+2-(2log₂3+1)/2
＝log₂3+2-log₂3-1/2
＝2-1/2
＝3/2
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