Re: wierd differential
- To: mathgroup at smc.vnet.net
- Subject: [mg51055] Re: wierd differential
- From: "Peter Pein" <petsie at arcor.de>
- Date: Sun, 3 Oct 2004 05:47:21 -0400 (EDT)
- References: <cjll9h$psl$1@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
It's because e^z=Exp[Log[e]*z] -- Peter Pein, Berlin to write to me, start the subject with [ "YOUNGWHAN" <ywsong at buffalo.edu> schrieb im Newsbeitrag news:cjll9h$psl$1 at smc.vnet.net... > > When I put > > \!\(D[1 - e\^\(\(-2\) \((y + 1)\)\), y]\) > > and, the result > > \!\(2\ e\^\(\(-2\)\ \((1 + y)\)\)\ Log[e]\) > > why Log[e] is added? > >