1, learning function, a core emphasis is simple and fast, which is divided into two methods, namely understanding and application.

2. First of all, we should understand that a function is the corresponding relationship between sets. Then, we should understand that there is more than one functional relationship between A and B, and finally, we should focus on understanding the three elements of a function.

3. Because functions are English letters, it is a process to convert English into Chinese and Chinese into real meaning.

There are many functions that everyone has forgotten. Actually, it's basically not used. As long as we use useful functions, it will be easier to use in the future.

5, mental method, an important way to solve problems, learned this, all the methods and skills, it is more handy to use.

Extended data:

1, the function is the correspondence between two mathematically non-empty sets: each element in the input value set can correspond to a unique element in the output value set.

2. Generally speaking, in the process of a change, it is assumed that there are two variables X and Y. If there is a unique Y corresponding to any X, then X is an independent variable and Y is a function of X. The range of X is called the domain of the function, and the range of Y is called the domain of the function.

Baidu Encyclopedia-Function (Mathematical Term)