Take calculus, the core of college mathematics, as an example.

What is the basis of calculus? Function, limit, continuity! Among them, function and continuity are the focus of high school. Learning calculus, the first chapter is learning function, limit and continuity.

For univariate function differential calculus and multivariate function differential calculus, the derivative of high school is very important, and the university is of course deeper.

For unary function integral calculus and multivariate function integral calculus (including multivariate magnitude function integral calculus and multivariate vector-valued function integral calculus, what? Or is it related to vectors? So the vector of high school is also very important. ) That's a lot of high school knowledge. What is trigonometric function? In short, it is inseparable from function. There are infinite poles, differential equations, etc. Without high school mathematics, it is unthinkable to learn this knowledge. Generally speaking, high school mathematics plays a very important and indispensable basic role in college mathematics.