Natural logarithm: ln(b)=logeb(e as the base), and the logarithm with constant e as the base is called natural logarithm, which is denoted as lnn(n >；; 0)。 The meaning of constant e is the limit value that can be achieved by doubling the growth continuously in unit time.

The algorithm of ln function, LN (Mn) = LNM+LNN (m/n) = LNM-LNN (mN) = NLNMLN1= 0LNE =1Note that in the absence of LN (M+N) = LNM+, after disassembly, M and N are.

The logarithm of the natural logarithm based on the constant e is called 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. In order to avoid confusion with the commonly used logarithm lgx based on 10, you can use "write all" ex.