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I need help wih prove (sqrt(2))^3 is irrational number

  1. Sep 28, 2008 #1
    hi well i'm having truple in proving this (sqrt(2))^3 is irrational number!!
  2. jcsd
  3. Sep 28, 2008 #2


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    If you think this can be proved by computer science, I can see why!

    It should be very simple to prove that if a is a rational number, then so it a3. Do you know Euclid's proof that [itex]\sqrt{2}[/itex] is irrational?
  4. Sep 29, 2008 #3
    well i need to prove the whole statement step by step how u proved it is irrational!
  5. Sep 30, 2008 #4


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  6. Oct 12, 2008 #5
    use Irrational_check(sqrt(2)^3)
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