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MathGroup Archive 1998

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Re: Sqrt Problems



PAUL REISER 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


I don't see why your expression should equal one.

I think it is equal to + or - (a + I b)/a.

The best mathematica will return even using ComplexExpand, FullSimplify
etc, is Sqrt[(a^2 + I b^2)/a^2]

The only way I could figure out to get it to simplify assuming reals is
with the package RealOnly.
-- 
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