/sci/ - Science & Math

How can I differentiate between meme and non meme book recommendations? These books should be good, no?
>1. Lang Basic Mathematics or Axler Precalculus
>2. Apostol or Spivac calculus
>3. Fischer Lineare Algebra and Forster Analysis (standard first semester books in germany afaik)
>1. Chartrand Mathematical Proofs

I know there are some German Anons here. I want to study math this fall. I have been out of highschool for over one year and I would not be able to solve Leistungskurs Abitur Mathematik right now, because I forgot so much stuff.
Then again it seems to me that you learn everything from the ground up in university anyway so should I bother with re-learning all the high school stuff?
Or in other words: What are the necessary prerequisites for a pure math degree in Germany?
Pic related is the stuff you do in Analysis and Linear Algebra 1.