Function is one of the important contents of mathematics, and its theory and application involve all branches of mathematics. Especially in middle school, function is always a main line.
The thought of function and equation is the most important mathematical thought, which accounts for a large proportion in the college entrance examination, and has many comprehensive knowledge, questions and application skills. In recent years, in the college entrance examination, function thought is mainly used to find the range of variables and solve inequalities. The application of equation viewpoint can be divided into four levels: solving equation; Discussion on parametric equation: enter the study of equation, such as the positional relationship between straight line and circle and conic curve, the nature and set relationship of function; Construct equation to solve.
Function is one of the most important tools in high school mathematics, and it is the basis for solving various problems. In the mathematics of the new curriculum standard in senior high school, the section of function and equation is also arranged.
-Functions are widely used in high school mathematics. For example, in trigonometric function, sine function and cosine function can be used to solve the angle problem; In derivative, derivative formula and derivative algorithm can be used to solve the maximum problem.