High school math textbooks can be done, but many of the 53 questions can't be done, such as functions. What should I do?
It is best to combine images with function questions, and then do some function application questions. You can find out their relationship and then list the corresponding functional relationships. If you encounter a function to find the domain, you can simplify it first and then combine the images. If you don't know the function, you can set the letter to a function you are familiar with and then answer it.