Re: Simply derivative question, Math 5.

*To*: mathgroup at smc.vnet.net*Subject*: [mg50251] Re: [mg50240] Simply derivative question, Math 5.*From*: Bob Hanlon <hanlonr at cox.net>*Date*: Mon, 23 Aug 2004 06:34:13 -0400 (EDT)*Reply-to*: hanlonr at cox.net*Sender*: owner-wri-mathgroup at wolfram.com

The input form of the exponential constant is E not e D[(1 + c*e^t)/(1 - c*e^t),t]//Simplify (2*c*e^t*Log[e])/(c*e^t - 1)^2 D[(1 + c*E^t)/(1 - c*E^t),t]//Simplify (2*c*E^t)/(c*E^t - 1)^2 Bob Hanlon > > From: "Ted Kahn" <tedkahn at mindspring.com> To: mathgroup at smc.vnet.net > Date: 2004/08/22 Sun AM 12:19:51 EDT > To: mathgroup at smc.vnet.net > Subject: [mg50251] [mg50240] Simply derivative question, Math 5. > > 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 > -- > >