Basic Mathematics by Serge Lang - 1.6 Multiplicative inverses (Basic Mathematics)

Wrapping up Chapter 1 of Basic Mathematics, let's reveal multiplicative inverses for rational numbers. We couldn't do this for integers, but we can for rationals. Using multiplicative inverses, we can solve equations very quickly, even when they seem really complicated. A lot of the rules for rationals match what we learned for integers, so we don't have to relearn much. Support Real Physics by buying the book through this Amazon affiliate link: https://amzn.to/2I5yIHr Here's my Patreon account if you want to give me money: https://www.patreon.com/realphysics Other ways to support Real Physics: https://youtu.be/44nldGgJCiw Playlist: https://www.youtube.com/playlist?list=PLMcpDl1Pr-viA25VUkHNmcUkWx9usPgyb Thank you!