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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?
>
>