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. In order to avoid confusion with the commonly used logarithm lgx based on 10, you can use "write all" ex.

The meaning of constant e is the limit value that can be achieved by doubling the growth continuously in unit time. ?

The base e of natural logarithm is given by an important limit. We define that when n approaches infinity,

.

E is an infinite acyclic decimal, and its value is approximately equal to 2.7 1828 1828459…, which is a transcendental number.