Assume that f(x) is continuous in some open interval J that contains the
point a,
and limit of f’(x) as x(a exists. Prove that f is differentiable at
a and
f’(a)=limit of f’(x) as x(a
Assume that f(x) is continuous in some open interval J that contains the point a, f'(x) exists for each x and limit of f'(x) as xa exists. Prove that f is differentiable at a and
f'(a)=limit of f'(x) as xa
keywords: differentiability
A continuity proof is provided. The solution is detailed and well presented. The response received a rating of "5/5" from the student who originally posted the question.