對(duì)數(shù)函數(shù)f(x)=logN=(lgN)/(lga),
當(dāng)y=N為增函數(shù),g=a為減函數(shù)時(shí),f(x)是增函數(shù),
當(dāng)y=N為減函數(shù),g=a為增函數(shù)時(shí),f(x)是增函數(shù)；
當(dāng)y=N為增函數(shù),g=a為增函數(shù)時(shí),f(x)可能是增函數(shù),也可能是減函數(shù),
當(dāng)y=N為減函數(shù),g=a為減函數(shù)時(shí),f(x)可能是增函數(shù),也可能是減函數(shù).
當(dāng)y=N為奇函數(shù),g=a為偶函數(shù)時(shí),f(x)是非奇非偶函數(shù)
當(dāng)y=N為偶函數(shù),g=a為奇函數(shù)時(shí),f(x)是非奇非偶函數(shù)
當(dāng)y=N為奇函數(shù),g=a為奇函數(shù)時(shí),f(x)是非奇非偶函數(shù)
當(dāng)y=N為偶函數(shù),g=a為偶函數(shù)時(shí),f(x)是偶函數(shù)