구글 클래스룸
GeoGebra지오지브라 클래스룸

Két pontban nem deriválható függvény

Drag "A" and look at the derivative graph.
Notice that f ' (x) is clearly discontinuous at x = 2 and x = -2. It is also undefined at those two points. So, clearly, continuity is not enough to ensure differentiability. Functions must also be "smooth."