The analysis process is as follows:

Formula: loga M = logb M/logb a

When b=e, M=x and b = e, m = x and a= 10.

Available: log10x = logex/loge10.

It can be replaced by: lg x=ln x/ ln 10.

Logarithm based on constant e. Write lnn (n >; 0)。 It is of great significance in physics, biology and other natural sciences. The general representation is lnx. Logx is also commonly used in mathematics to represent natural logarithm.

Lg: Represents the logarithm (common logarithm) based on 10, such as lg 10= 1.

Extended data:

Arithmetic of logarithm:

1、log(a) (M N)=log(a) M+log(a) N

2、log(a) (M÷N)=log(a) M-log(a) N

Log (m n = nlog (a)

4、log(a)b*log(b)a= 1

log(a) b=log (c) b÷log (c) a