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Simply derivative question, Math 5.

• To: mathgroup at smc.vnet.net
• Subject: [mg50240] Simply derivative question, Math 5.
• From: "Ted Kahn" <tedkahn at mindspring.com>
• Date: Sun, 22 Aug 2004 00:19:51 -0400 (EDT)
• Sender: owner-wri-mathgroup at wolfram.com

Hello- I am trying to take the derivative of the following function:

(1 + c*e^t)/(1 - c*e^t)

with respect to t.

================
\!\(Simplify[D[\(1 + c\ e\^t\)\/\(1 - c\ e\^t\), t]]\)
============

The answer I get includes an "extra" Log[e] in the numerator. Am I not  
using the program correctly or am I not understanding the answer  
correctly? Other?

thanks, -ted
-- 

• Follow-Ups:
  • Re: Simply derivative question, Math 5.
    • From: Murray Eisenberg <murray@math.umass.edu>
  • Re: Simply derivative question, Math 5.
    • From: DrBob <drbob@bigfoot.com>