define "first principal of derivative" in your own werds plz!!

Question

danjs · Answer

hmm, what is first principal? like the limit definition?

yumyum247 · Answer

yeah in this case we're going to be using limit...so

danjs · Answer

ok, yeah just explain how you start with a function f(x),  and how the definition is put together with algebra... like using the secant slope of two points to estimate the tangent slope better and better

danjs · Answer

or you just have to define what it is?   Maybe just say you use algebra to find the expression for the slope of a tangent to a curve, at any value x. Then state the definition  
f ' (x) = ,,,

yumyum247 · Answer

ok thanks!!