triplesun·5 tahun yang lalu·discussBook Of Proof by Richard Hammack[0]. A really nice and FREE introduction to higher math (or "actual" math). No particular prereqs other than comfort with doing arithmetic in fractions and decimals.[0] https://www.people.vcu.edu/~rhammack/BookOfProof/
[0] https://www.people.vcu.edu/~rhammack/BookOfProof/