The first mention of the constant e is a table in the appendix of John Napier's logarithmic works published in 16 18. But it didn't record this constant, only a list of natural logarithms calculated from it, which is generally believed to be made by William Oughtred. It was Jacob Bernoulli who first thought that E was a constant.

The earliest known uses of the constant e are 1690 and 169 1 year, which is represented by B. In 1727, Euler began to use e to represent this constant. E was first used in publications, and it was Euler Mechanics in 1736. Although some researchers later used the letter C, E was widely used and finally became the standard.

Extended data:

E is an irrational number in mathematics and a symbol representing a number in mathematics, but it is not limited to the field of mathematics. In nature, structure, shape, interest rate or hyperbolic area, calculus textbooks, Bernoulli family, etc. Now e has been calculated to two thousand decimal places.

Limit expression of e:

e = lim & ltx-& gt； 0 & gt( 1+ 1/x)^x

= lim & ltn->； +∞& gt； { 1，2，3，4，…，n}

= lim & ltx-& gt； +∞& gt； ∑(0，x) 1/i！

Note: {1, 2, 3, 4, …, n} =1+1+1[2+(1/3+{/kloc]

Baidu Encyclopedia-Natural Constant