I agree Linear and Combi is far more useful once you get going on a technical degree and/or career, but go to a university in the US and check the prerequisites

I agree Linear and Combi is far more useful once you get going on a technical degree and/or career, but go to a university in the US and check the prerequisites on these courses: CALCULUS. This was another reason I wrote this book. For people who just need to get through calc, here's some help that you can pick up and read in a couple hours.