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Re: Solve fails with this simple inequality problem

  • To: mathgroup at smc.vnet.net
  • Subject: [mg115654] Re: Solve fails with this simple inequality problem
  • From: Bob Hanlon <hanlonr at cox.net>
  • Date: Mon, 17 Jan 2011 05:41:14 -0500 (EST)

First, don' t use Set ( = ) in an equation; use Equal ( == )

Floor[Sqrt[19] + 7]

11

So the result is empty since Meter cannot be 11 and less than 6. If you meant the Sqrt to be negative

Solve[Meter == Floor[-Sqrt[19] + 7] && Meter < 6, Meter]

{{Meter -> 2}}


Bob Hanlon

---- KenR <ramsey2879 at msn.com> wrote: 

=============
Solve[Meter = Floor[Sqrt[19]+7] && Meter < 6, Meter] gives a null "{}"
Any workarounds?



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