函数概念最早出现在17世纪英国数学家格雷戈里的文章《论圆和双曲线的求积》(1667年)中.他定义函数是这样一个量:它是从一些其他量经过一系列代数运算或者任何其他可以想象到的运算而得到的.自从牛顿于1665年开始微积分(研究曲线的弧长、不规则图形的面积等的一个数学分支)的研究工作后,他一直使用“流量”一词来表示变量间的关 The notion of function first appeared in an article by the English mathematician Gregory of the seventeenth century, “On the Convergence of Circles and Hyperbolic Curves” (1667). The definition of a function is that quantity which is derived from some other quantity through a series of algebraic operations Or any other imaginable operation since the beginning of Newton’s calculus in 1665 (a mathematical branch of the study curve’s arc length, the area of ​​irregular shapes, etc.), he has been using “flow ”The word to indicate the relationship between variables