I'm stick on differentiating, from first principles, the following function:
f(x) = (3x-1)/(x+2)
I plug that into:
[f(a+h) - f(a)]/h
and I get:
But when I use the quotient rule to do it, I end up with:
I've been trying to get rid of that bothersome h, but I just haven't found a way to do it! I have a feeling that I'm overlooking something really simple. Any help appreciated.