HallsofIvy: I have also learned some multivariable Calculus, only differentiation, not integration. Do I need to study multivariable integration before taking ODE?
Thank all of you for the advices.
This is my first time posting in this forum, I am not very familiar with the rules.
I am a year 1 physics student, and I had only taken 1 variable calculus( I also know some basic linear algebra, e.g. how to calculate eigenvector in 2x2 situation, don't know Gram–Schmidt process for...