1. integral is the core concept in calculus and mathematical analysis. Usually divided into definite integral and indefinite integral.
1, definite integral:
Definite integration refers to integrating a function in an interval to get a fixed value. Specifically, for the function f(x), the definite integral in the interval [a, b] can be expressed as ∫ a BF (x) dx. The meaning of this formula is to divide the interval [a, b] into infinitesimal blocks, multiply the area on each block by the corresponding function value, and then add all the results to get a numerical value. This value can represent the area or volume of this function in this interval.
2, indefinite integral:
Indefinite integration is to integrate a function and get a function. Specifically, for a function f(x), the indefinite integral of x at a certain point can be expressed as ∫f(x)dx. This formula means that if you find that the derivative of a function f(x) is equal to f(x), that is, F'(x)=f(x), then F(x) is the indefinite integral of F(x). Indefinite integral is usually used to solve the length, curvature, maximum and minimum values of curves.
Second, the disguised marketing methods of merchants
Points redemption is the redemption or redemption of accumulated points when members participate in specific activities. It is an indispensable part of the overall management system. Some integral systems divide integrals into various types. Different types of integrals can be converted. Such as gold coin integral, silver coin integral, etc.
The rapid development of point redemption in modern society is mainly due to the continuous development of various commercial means in modern commercial society, such as promoting sales, enhancing the stickiness of members and improving user experience.