Mathematica 9 is now available
Services & Resources / Wolfram Forums
-----
 /
MathGroup Archive
2004
*January
*February
*March
*April
*May
*June
*July
*August
*September
*October
*November
*December
*Archive Index
*Ask about this page
*Print this page
*Give us feedback
*Sign up for the Wolfram Insider

MathGroup Archive 2004

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

Search the Archive

Q: Solve gives complex solution where there is a noncomplex solution how to get the last one?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg50300] Q: Solve gives complex solution where there is a noncomplex solution how to get the last one?
  • From: "Dick Barends" <dick.barends at wxs.nl>
  • Date: Thu, 26 Aug 2004 06:50:41 -0400 (EDT)
  • Sender: owner-wri-mathgroup at wolfram.com

Hello,

The following line

Solve[x y / ( 1 + y^2 )^0.5 == a, y]

Gives a complex solution : (0.+ i )a / (a^2 - x^2)^0.5
Which is correct but could be simpler, not complex

The solution I expected is: a/(x^2 - a^2)^0.5

How can I instruct Mathematica (Solve) to give the simple solution directly.

kind regards
Dick Barends



  • Prev by Date: Integrate UnitStep, Bug?
  • Next by Date: Re: subscripted function variables
  • Previous by thread: Re: Integrate UnitStep, Bug?
  • Next by thread: Re: Q: Solve gives complex solution where there is a noncomplex solution how to get the last one?