MathGroup Archive 2004

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Abs function

  • To: mathgroup at
  • Subject: [mg47238] Abs function
  • From: nikmatz <nikmatz at>
  • Date: Wed, 31 Mar 2004 02:59:39 -0500 (EST)
  • Organization: National Technical University of Athens, Greece
  • Sender: owner-wri-mathgroup at


i try to find the derivative of Abs[x]
and i have this

In: D[Abs[x],x]

Out: Abs`[x]

i don't know the mean of `

please help


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