Re: ln(e) <>1 on TI-92 II

To: CALC-TI@LISTS.PPP.TI.COM
Subject: Re: ln(e) <>1 on TI-92 II
From: Jeff Tyrrill <Jeff_Tyrrill@MSN.COM>
Date: Sun, 8 Jun 1997 18:25:43 UT
Reply-To: Jeff Tyrrill <Jeff_Tyrrill@MSN.COM>

You can't type "e" on the keyboard; you need to use the "e^" button above the
natural logarithm button. If you do it correctly, the "e" will be italicized
on the entry line.
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-----Original Message-----
From:   Open discussion of TI Graphing Calculators  On Behalf Of Niklas Brunlid
Sent:   Sunday, June 08, 1997 8:19 AM
To:     CALC-TI@LISTS.PPP.TI.COM
Subject:        ln(e) <>1 on TI-92 II

This may be an old bug, but I haven't seen it before:

  d(e^(a*x+b*y),x)      (d=derive)

gives the answer

  a*ln(e)*e^(a*x+b*y)

on my TI-92 II. It fails to see that ln(e) should be simplified to 1.
A somple ln(e) gives you the answer 1, though...

--

 - Niklas Brunlid (nma95nbr@student1.lu.se)
PQF quote follows:

"Let's just say that if complete and utter chaos was lightning, he'd be the
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           (Terry Pratchett, The Colour of Magic)