If the x power of a is equal to n (a >; 0, and a≠ 1), then the number x is called the logarithm of n with a as the base, and is recorded as x=logaN. Where a is called the base of logarithm and n is called real number.

Related operational properties of logarithm;

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)。