Re: Thx for your help

*To*: mathgroup at smc.vnet.net*Subject*: [mg23809] Re: [mg23712] Thx for your help*From*: "Richard Finley" <rfinley at medicine.umsmed.edu>*Date*: Sat, 10 Jun 2000 03:00:18 -0400 (EDT)*Sender*: owner-wri-mathgroup at wolfram.com

Jose Note that for real x, Abs[x] = Sqrt[x^2] ... so you can use In[1]:=Integrate[Sqrt[x^2],x] Out[1]:= x Sqrt[x^2]/2 but be careful....clearly it is not correct off the real axis: Abs[i] = 1 Sqrt[i^2] = i where i = Sqrt[-1] regards....RF >>> José María Lasso <jml at accessinter.net> 05/29/00 08:05PM >>> Hi, Thx for the answers to my last post, but I have a new question, similar to the last one, when I try: Integrate[Abs[x],x], there is no result, just the original input, what I am doing wrong?, I need some advice about a good book about Mathematica for beginers.Thx again.Best regards Jose M Lasso