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MathGroup Archive 2005

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Re: a simplification problem

  • To: mathgroup at smc.vnet.net
  • Subject: [mg55263] Re: [mg55172] a simplification problem
  • From: yehuda ben-shimol <bsyehuda at gmail.com>
  • Date: Thu, 17 Mar 2005 03:31:32 -0500 (EST)
  • References: <200503161035.FAA23728@smc.vnet.net>
  • Reply-to: yehuda ben-shimol <bsyehuda at gmail.com>
  • Sender: owner-wri-mathgroup at wolfram.com

If you look carefully
x==(-1)^(1/3)
then
Solve[x^3==-1,x] gives the following results
{{x -> -1}, {x -> (-1)^(1/3)}, {x -> -(-1)^(2/3)}}
So x=(-1) is not the only solution.
yehuda

On Wed, 16 Mar 2005 05:35:49 -0500 (EST), Hui Fang <fangh73 at xmu.edu.cn> wrote:
> Dear All,
> 
> My questions is simple:
> How do I simplify (-1)^(1/3) to -1?
> 
> Thanks!
> 
>


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