对数性质？

对数性质？

对数基本性质

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)

其他性质

1.换底公式：log(a)(N)=log(b)(N)÷log(b)(a)

2.log(a)(b)=1/log(b)(a)