Real function/Derivative function/Definition
Derivative
Let denote an interval, and let
be a function. We say that is differentiable, if for every point , the derivative of in exists. In this case, the mapping
is called the derivative of .
Let
denote an
interval,
and let
be a
function.
We say that is differentiable, if for every point
,
the
derivative
of
in
exists. In this case, the
mapping
is called the derivative of .