Background: It has been about a year and a half since I took Calc 3 so I am not as familiar with using derivatives as I would like to be. Basically my math dept. had a concentration in math-stats that didn't even require differential equations at all, so I wasn't expecting to take the course. Now that I am moving into the computational math concentration I need to take the course. I have done Calc 1-3, Linear Algebra, and two introductory proof classes one which got into some Advanced Calc stuff (metric spaces, equivalence relations, etc...) Question: As stated in the topic, which aspects of derivatives should I review for Diff. Eq?