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# Re: Sqrt Problems
*To*: mathgroup@smc.vnet.net
*Subject*: [mg12120] Re: Sqrt Problems
*From*: "Stephen P Luttrell" <luttrell@signal.dra.hmg.gb>
*Date*: Mon, 27 Apr 1998 01:46:06 -0400
*Organization*: Defence Evaluation and Research Agency
*References*: <6hpb0f$d3s@smc.vnet.net>
>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]
>...
I think you have your * and / swapped round.
Try the * and / the other way round, square the expression, and use
Simplify, as follows:
((Sqrt[a+I*b/a] / Sqrt[a^2+I*b] ) Sqrt[a])^2//Simplify
This gives the output
1
============================================================
Stephen P Luttrell
luttrell@signal.dra.hmg.gb
Adaptive Systems Theory 01684-894046 (phone)
Room EX21, DERA 01684-894384 (fax)
Malvern, Worcs, WR14 3PS, U.K.
http://www.dra.hmg.gb/cis5pip/Welcome.html
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