# Derivative - definition

Teacher's questions

### Derivative - definition

What is a derivative of a function?
Math Tutor

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### Re: Derivative - definition

Derivative :Let y=f(x) be a function. The derivative of the function is the function whose value at x is the limit, provided this limit exist
=> f'(x)=lim h->0 [f(x+h)-f(x)]/h

Know more about Second Derivative Notation http://goo.gl/TuCmF1

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### Re: Derivative - definition

It means that, for the function x2, the slope or "rate of change" at any point is 2x.

leesajohnson

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