我對(duì)于高中數(shù)學(xué)必修一上對(duì)數(shù)函數(shù)不是太懂,

數(shù)學(xué)人氣：812 ℃時(shí)間：2020-10-01 15:04:57

優(yōu)質(zhì)解答

如果a^n=b,那么log(a)｛b｝=n.其中,a叫做“底數(shù)”,b叫做“真數(shù)”,n叫做“以a為底b的對(duì)數(shù)”.相應(yīng)地,函數(shù)y=log(a)｛x｝叫做對(duì)數(shù)函數(shù).對(duì)數(shù)函數(shù)的定義域是（0,+∞).零和負(fù)數(shù)沒有對(duì)數(shù).底數(shù)a為常數(shù),其取值范圍是(0,1)∪(1,+∞).
1.對(duì)數(shù)函數(shù)的圖象都過(1,0)點(diǎn).
2.對(duì)于y=log(a)(n)函數(shù),①,當(dāng)0