Re: Stupid simple question about counting derivatives
- To: mathgroup at smc.vnet.net
- Subject: [mg33460] Re: Stupid simple question about counting derivatives
- From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
- Date: Fri, 22 Mar 2002 04:06:36 -0500 (EST)
- Organization: Universitaet Leipzig
- References: <a7crpm$hu8$1@smc.vnet.net>
- Reply-to: kuska at informatik.uni-leipzig.de
- Sender: owner-wri-mathgroup at wolfram.com
Hi, you forgot a space between a and x D[a x,x] gives a Dt[a x,x] gives a+x D[a,x] as it should. Regards Jens Jack wrote: > > 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