ABSTRACT
Let f(x) and g(x) be functions that are differentiable in an open interval containing the point a, and have derivatives and f ′(x) = f(x) and g′(x) = g(x).
f x f a x a f a x a f a x a f a( ) = ( ) + −( ) ′( ) + −( ) ′′( ) + −( ) ′′′( ) +… 2 3
2 3! !
