Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Easy math quesiton

  1. Mar 30, 2008 #1

    When are a and x whole integers?
  2. jcsd
  3. Mar 30, 2008 #2


    User Avatar
    Staff Emeritus
    Science Advisor

    In what sense does this have anything to do with "Tensor Analysis and Differential geometry"? I'm moving it to "number theory".

    In any case, if 3x2= a2 for a and x integers, then we must have
    [itex]a= x\sqrt{3}[/itex] which is impossible unless x= a= 0. It implies [itex]\sqrt{3}= a/x[/itex] but [itex]\sqrt{3}[/itex] is irrational.

    The only integer solution to 3x2= a2 is x= a= 0.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Similar Discussions: Easy math quesiton
  1. Easy questions (Replies: 3)