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Stupid simple question about counting derivatives

• To: mathgroup at smc.vnet.net
• Subject: [mg33437] Stupid simple question about counting derivatives
• From: Jack <kielczew at poczta.onet.pl>
• Date: Thu, 21 Mar 2002 09:27:20 -0500 (EST)
• Sender: owner-wri-mathgroup at wolfram.com

How do I get Mathematica 2.2 to count the derivatives of the simplest
parametric functions, i.e.

(ax)', where a is the parameter and x is the variable. I want to get:

a

(Hey, I said it was stupid).

D[ax,x] gets me 0, Dt[ax,x] gets me Dt[ax,x] and I haven't figured out
how to use Constants and NonConstants. I'd be grateful for any help as
this simple problem is driving me crazy.


--
Jacek Kie³czewski
kielczew at poczta.onet.pl

• Follow-Ups:
  • Re: Stupid simple question about counting derivatives
    • From: Tomas Garza <tgarza01@prodigy.net.mx>
  • Re: Stupid simple question about counting derivatives
    • From: Fernando Rinaldi <fernando.rinaldi@e-technik.uni-ulm.de>