Friday, November 21, 2008

Differentiation - Definition

Let f be a function definedon a neighbourhood of a real number a.
f is said to be differentiable or derivable at a if Lt(x→a) [{f(x)-f(a)}/(x-a)] exists finitely. The limit is called the derivative or differential coefficient of f at a.

It is denoted by f'(a).

No comments: