I have added to the existing calculators on the blog a calculator for the first-order partial derivatives (after x and after y) of functions of two variables f(x,y):
I am very pleased to inform you that we are taking another step forward in eTrapez. We have created an application thanks to which you can learn to calculate derivatives in a completely new way. The principle is very simple: you solve the derivative from our Homework as before, with the difference that you enter […]
Calculating directional derivatives as a subject to be covered (i.e. to be passed) is actually right after partial derivatives of functions of many variables, which most students cover in the second semester. However, this is a topic rarely taken up that I did not include it in my Partial Derivatives Course and often enough that I will post it on the blog - for the benefit of those who need to learn directional derivatives and those who are simply curious about what's up. However, I would like to point out that, as in the Courses, I will focus today almost exclusively on practice ("how do I do it?") and not on theory ("what am I actually doing?").
I invite you to use the derivatives calculator I have redesigned: I think that here the issue is very clear. We type in the function, click on 'Calculate' and we have its derivative.