I am really struggling with a highschool calculus question which involves finding the derivative of a function using the first principles.
The question is as follows:
Find the derivative of f(x) = (3x-1)/(x+2) when x ≠ -2
I am having trouble with this problem because I am unsure what to do when I have put my function of f(x+h) into the equation f'(x) = [f(x+h)-f(x)]/h.
This is a link so my working so far and I would greatly appreciate it if you could please explain the steps how to finish this question.