Lz~~ I can only say ~ ~ mathematical modeling, 2~3 years, unless LZ has mathematical talent ~ ~ otherwise it is basically unrealistic to start from junior high school ~ ~. I use lz to say it backwards ~ ~ I want to make good use of mathematical modeling ~ ~ University stage: mathematical analysis, linear algebra (this is the basic content of mathematical modeling ~ ~ everything in it must be mastered), functional analysis, ordinary differential equations, real variable functions, complex variable functions (this is more difficult to understand), mathematical physical equations (the above are necessary for mathematics majors to learn mathematical modeling ~ ~), If non-mathematics majors want to master ordinary differential equations and real variable functions at least in high school (in fact, the mathematics content in high school is simple high numbers and linear algebra ~ ~), not to mention junior high school ~~lz wants to ask about the mathematical model in the textbook ~ ~ I can only tell lz that almost all the contents used are useful ~ ~

Also, I think the mathematical model at work ~~lz may be simple ~ ~ Real mathematical modeling is very troublesome ~ ~