<p>Does anyone know anything about math 20D? I believe it's differential calculus or something. Has anyone taken it? What did you think of it? Thanks for the help!</p>
<p>I took it last winter, and didn't think it was that bad at all. I thought it was slightly more difficult than 20E (vector calculus), but easier to understand than 20F (linear algebra). Since I took it almost a year ago I don't remember too many specific details from it, but for most of the course you're basically learning different methods of solving various differential equations. Once you learn a specific method, you just have to figure out which types of diff. eq's that method applies to, and then it becomes pretty routine to solve from there. The hardest part of the course was towards the end when we had to solve diff. eq's with sequences/series, because I hadn't touched that stuff since the AP calc test in high school. Despite this, I would still probably recommend the course! :)</p>