Re: der2 on TI-86?


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Re: der2 on TI-86?



Message from Nester, Darryl [19:47 00-02-01 ]:
 >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?

I get same error. I hope this help :-)

However, taking
    der2(x^3-12x^2+6x+10,x,0.00001)
gives the correct answer
    -23.99994

It seems that the reason is the numerical derivation
alogrithm used in TI-86.

Regards
mjw

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