對(duì)數(shù)函數(shù)

詞語解釋

對(duì)數(shù)函數(shù)（對(duì)數(shù)函數(shù)）[ duì shù hán shù ]

⒈  函數(shù)y=logax(x∈r+)稱為對(duì)數(shù)函數(shù)。這里a＞0且a≠1。是指數(shù)函數(shù)y=ax的反函數(shù)。