Date: Oct 24, 2012 11:36 AM
Author: Louis Talman
Subject: Re: [ap-calculus] Double Derivatives

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A number of people have replied to this question, correctly. But I wish
they'd mentioned that their answers reflect an important fact: The meaning
of the sentence, "The test fails," is precisely what they're illustrating.

When we say that a test fails, we mean exactly that the test doesn't give
us *any* useful information about the phenomenon we used the test for.

On Tue, Oct 23, 2012 at 3:12 PM, Debbie Bricker <
DBricker@cathedralcatholic.org> wrote:

>
> NOTE:
> This ap-calculus EDG will be closing in the next few weeks. Please sign
> up for the new AP Calculus
> Teacher Community Forum at
> https://apcommunity.collegeboard.org/getting-started
> and post messages there.
> ----------------------------------------------------------------------------------------------------------------------------
> In using the second derivative test for extrema, you may get the second
> derivative to equal zero when plugging in a critical number and the test
> then fails. Will this point then be a POI?
>
> Debbie
>
> To search the list archives for previous posts go to
> http://lyris.collegeboard.com/read/?forum=ap-calculus
>




--
--Louis A. Talman
Department of Mathematical and Computer Sciences
Metropolitan State College of Denver

<http://rowdy.mscd.edu/%7Etalmanl>

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