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MathGroup Archive 2004

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wierd differential

  • To: mathgroup at
  • Subject: [mg51032] wierd differential
  • From: "YOUNGWHAN" <ywsong at>
  • Date: Sat, 2 Oct 2004 03:18:04 -0400 (EDT)
  • Organization: The University at Buffalo
  • Sender: owner-wri-mathgroup at

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?

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