Re: Absolute Value of Complex Numbers

*To*: mathgroup at smc.vnet.net*Subject*: [mg35217] Re: Absolute Value of Complex Numbers*From*: "John Doty" <jpd at w-d.org>*Date*: Tue, 2 Jul 2002 02:13:18 -0400 (EDT)*References*: <afp0oh$h08$1@smc.vnet.net>*Sender*: owner-wri-mathgroup at wolfram.com

In article <afp0oh$h08$1 at smc.vnet.net>, "Kyle Davis" <kyledavis at nowhere.com> wrote: > Abs[2 Exp[3 * i]] answer = 2 > > Abs[2 Exp[k * i]] answer = 2 Exp[-Im[k]] > > Isn't the second answer supposed to be the same with the first one, > regardless with the value of k? Only if k is real. > How do I make the second calculation give me the right answer? In[1]:= ComplexExpand[Abs[2 Exp[k * I]]] Out[1]= 2 ComplexExpand[] performs the expansion assuming all variables represent real numbers. -- | John Doty "You can't confuse me, that's my job." | Home: jpd at w-d.org | Work: jpd at space.mit.edu