
Re: Undefined vs zero second derivative
Posted:
Oct 14, 1998 11:42 AM


Ron Selke asks:
> So I put it out here: If I gave you two graphs, each with a point of > inflection, one where f'' = 0 and one where f'' is undefined, could you
> tell which was which?
I don't know whether Ron can or not. I can't. Consider the curve
y = x Abs[x]
at the origin.
Lou Talman

