MathGroup Archive 1998

[Date Index] [Thread Index] [Author Index]

Search the Archive

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

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





  • Prev by Date: Re: Very odd behaviour in Mod/N
  • Next by Date: Re: Control System Professional Wins Award from Control Engineering
  • Prev by thread: Re: Sqrt Problems
  • Next by thread: An Interesting Interpolation Problem