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MathGroup Archive 2007

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Re: Inequalities

  • To: mathgroup at smc.vnet.net
  • Subject: [mg78055] Re: [mg77978] Inequalities
  • From: Andrzej Kozlowski <akoz at mimuw.edu.pl>
  • Date: Fri, 22 Jun 2007 06:32:36 -0400 (EDT)
  • References: <200706210929.FAA24243@smc.vnet.net>

On 21 Jun 2007, at 18:29, Bruno Campanini wrote:

> -10 <= 3x+2 <= 10
>
> I tried with FindInstance and Reduce but was unable to
> get the right range solution  -4 <= x <= 8/3
>
> Any suggestions.
>
> Bruno
>

You used Reduce and were unable to find " the right range  
solution" ???? Are you serious? What version of Mathematica?

Reduce[-10 <= 3*x + 2 <= 10, x]
-4 <= x <= 8/3

Andrzej Kozlowski


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