*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