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Topic: Undefined vs zero second derivative
Replies: 13   Last Post: Oct 19, 1998 11:14 PM

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Lou Talman

Posts: 876
Registered: 12/3/04
Re: Undefined vs zero second derivative
Posted: Oct 14, 1998 11:42 AM
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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

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