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Re: Sqrt Problems

• To: mathgroup@smc.vnet.net
• Subject: [mg12149] Re: Sqrt Problems
• From: dreissNOSPAM@nospam.earthlink.net (David Reiss)
• Date: Mon, 27 Apr 1998 01:46:31 -0400
• Organization: EarthLink Network, Inc.
• References: <6hpb0f$d3s@smc.vnet.net>

In article <6hpb0f$d3s@smc.vnet.net>, PAUL REISER
<REISER@HRTS.NRL.NAVY.MIL> wrote:

> Forgive me if this is a simple question, but I am trying to get  "1" out
> of the following expression and I can't seem to figure out how:
> 
>         u = Sqrt[a+I*b/a] * Sqrt[a^2+I*b] / Sqrt[a]
> 
> Is there a package I'm missing or something?
> 
>         Thanks - 
>         Paul Reiser


The expression in question is not equal to 1:

In[1]:= u = Sqrt[a + I*b/a]*Sqrt[a^2 + I*b]/Sqrt[a]

Out[1]= (Sqrt[a^2 + I*b]*Sqrt[a + (I*b)/a])/Sqrt[a]

In[2]:= Expand[u^2]

Out[2]= a^2 + 2*I*b - b^2/a^2


Perhaps you made a mistake when you typed the input line that  you
wanted?

-- 
David Reiss
dreissNOSPAM@nospam.earthlink.net
http://home.earthlink.net/~dreiss
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