Asked by Katie

what is a derivitive?
And how do you get it (f(x)=2x) from f(x)=x^2-3?

Answers

Answered by bobpursley
Hmmmm. YOu must be only in limits,not yet to derivatives.

If there is a function f(x), the derivative is defined as...

lim d>>0 of (f(x+d) -f(x))/d

Answered by Katie
Oh! I've seen that equation we just don't call it a derivative. thanks!
Answered by bobpursley
This is ahead of your class..
http://en.wikipedia.org/wiki/Derivative

One thing I strongly recommend to you, is go visit the nearest college bookstore, or Barnes Noble, and take a close look at this: Schaum's Outline Series, Calculus.

It is inexpensive, chock full of example problems worked, and is easy to read. Don't hesitate...ask mom for an early birthday present of it.
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