Question

Does the question asked by appleduardo: how do I find the limit of f(x) .... amount to the same thing as asking: "how do i derive the first derivative of f(x)

Answer 1

the reason I ask is that I am new to calculus and I am used to seeing limit questions with a lim of some f(x) as x approaches some specified value ... a bit confused....

Answer 2

first derivative of f(x)
f'(x)= lim h--->0 {f(x+h)- f(x)} /h

Answer 3

and for finding the limit of a function..what does f(x) approach, when x approaches some value e.g. x--->a
ex
lim x--->2 (x+2) = (2+2)=4

lim x-->2 (x^2-4)/(x-2)
since x approaches 2 so we can cancel out the common factor (x-2) from numerator and denominator, hence limit is 4.