Hello, I study generalized integral in my freshman year. Why should I teach advanced mathematics, mathematical analysis or calculus in my freshman year? It is because these are the basic courses of science and economics. Because you don't learn these basic knowledge, you can't continue to study in the following courses, such as function limit, derivative differential, integral and its application, spatial analytic geometry, multivariate function calculus, multiple integral, differential equation, infinite number and so on. If you study mathematics in grade three, you have to learn difference equations, so generalized integral.

I wish you a happy study.