Question

对数的基本公式是什么啊?

Answer 1

1、a^log(a)(b)=b

2、log(a)(a)=1

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)[M^（1/n）]=log(a)(M)/n

（注：上文^均为上标符号,例：a^n即为a的n次方）　　7.logab*logba=1