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Re: 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]

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



Stephen P Luttrell
Adaptive Systems Theory                           01684-894046 (phone)
Room EX21, DERA                                    01684-894384 (fax)
Malvern, Worcs, WR14 3PS, U.K.

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