Domain refers to the effective range of a function, and its symmetry about the origin means that its effective value is symmetrical about the origin. The domain of a function is the set of all real numbers that make this function relationship meaningful. For example, the function y=2x+ 1 is defined as-10 and 10, which is symmetrical.

Chinese name

F(x) is the symbol (y) of the function, F represents the rule, and Y represents the ordinate value of each point on the function image, so the ordinate of all points on the function image constitutes a set, which is the range of the function. X is the independent variable, representing the abscissa of each point on the function image, and the range of the independent variable is the definition range of the function. F is the representative of correspondence law, which can be determined by the analytical formula of f(x). For example, f (x) = x 2+1, where f means that the independent variable x is squared first and then1is added. The range of x2+1(x2+1≥1) is the range of f(x)=x2+ 1. If you understand the above questions, you only have a preliminary understanding of the function f(x), and we need to have a deeper understanding of f(x).