基本性質(zhì)：
1、a^(log(a)(b))=b
2、log(a)(a^b)=b
3、log(a)(MN)=log(a)(M)+log(a)(N);
4、log(a)(M÷N)=log(a)(M)-log(a)(N);
5、log(a)(M^n)=nlog(a)(M)
6、log(a^n)M=1/nlog(a)(M)
其他性質(zhì)：
1.換底公式
log(a)(N)=log(b)(N)÷log(b)(a)
2.log(a)(b)=1/log(b)(a)
3.對(duì)數(shù)函數(shù)的圖象都過(guò)(1,0)點(diǎn).
4.對(duì)于y=log(a)(n)函數(shù),
①,當(dāng)0