Hi, I'm starting derivatives and I am getting confused. Some problems seem easier solved by
x - a
As x approaches a
and some by
as h approaches 0
Why is this and how do I choose the best option? Does it matter if it's a velocity problem and not a tangent problem? I thought they were the same. Does it matter if I have a point (c,f(c)) to go off of? I apologize if I'm not making much sense, but I have practiced both methods and still don't understand why they are different.