Re: der2 on TI-86?

To: CALC-TI@LISTS.PPP.TI.COM
Subject: Re: der2 on TI-86?
From: William Rickman <RickmanW@MAIL.SEMINOLE.CC.FL.US>
Date: Tue, 1 Feb 2000 17:44:41 -0500
Reply-To: William Rickman <RickmanW@MAIL.SEMINOLE.CC.FL.US>

I think the problem is it uses basic symbolic derivatives.
  For der2(x^3-12x^2+6x+10,x,0) , it finds the second to be 6x^1+24x^0.
  Then substitutes 0 for x and gets 6*0^1+24*0^0. But 0^0 is indeterminate. So it gives an error.

>Michael Florea at michaelf@COLUMBIACU.ORG asked:
>
>> Can anyone tell me why I can't do the following command on a TI-86?
>>
>> der2(x^3-12x^2+6x+10,x,0)
>>
>> This should just be the second derivative of the function at x=0 which
>> equals -24, right?  I keep getting "ERROR 04 DOMAIN".  Am I missing
>> something incredibly obvious?

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