Differentiable function - Wikipedia
https://en.wikipedia.org/wiki/Differentiable_functionA function , defined on an open set , is differentiable at if the derivative exists. This implies that the function is continuous at a. This function f is differentiable on U if it is differentiable at every point of U. In this case, the derivative of f is thus a function from U into A differentiable function is necessarily continuous(at every point where it is differentiable). It is c…
Continuity and Differentiability
https://www.zweigmedia2.com/RealWorld/calctopic1/contanddiffb.htmlPart B: Differentiability. Note To understand this topic, you will need to be familiar with limits, as discussed in the chapter on derivatives in Calculus Applied to the Real World. If you like, you can review the topic summary material on derivatives and limits or, for a more detailed study, the on-line tutorial on derivatives.. To begin, we recall the definition of the derivative of a ...