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MathGroup Archive 1998

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Re: Sqrt Problems




-----Original Message-----
From: PAUL REISER <REISER@HRTS.NRL.NAVY.MIL> To: mathgroup@smc.vnet.net
Subject: [mg12116] [mg12042] Sqrt Problems


>
>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]
>


Paul ,
I suppose the following holds

u = Sqrt[ (a^2+I*b)/a  * (a^2+I*b)  /  a] =  +- (a^2+I*b  /  a)

so even with a pencil - you won't get 1.

Clemens




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