1.log5为底的4的对数*log8为底的5的对数化成同底2的对数原式= ( log₂4)/(log₂5)*(log₂5）/（log₂8)=2/32.化简log2为底3的对数*log27为底125的对数化成同底2的对数原式=log₂3*(logS...