Results 1 to 2 of 2

Math Help - Proofing Divisors

  1. #1
    Junior Member
    Joined
    May 2008
    Posts
    55

    Post Proofing Divisors

    Prove that if alb and bla, then a=b or a=-b.
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor red_dog's Avatar
    Joined
    Jun 2007
    From
    Medgidia, Romania
    Posts
    1,245
    Thanks
    1
    a|b\Rightarrow b=a\cdot q_1
    b|a\Rightarrow a=b\cdot q_2=aq_1q_2\Rightarrow q_1q_2=1
    Then, q_1=q_2=1\Rightarrow a=b

    or q_1=q_2=-1\Rightarrow a=-b
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Relitivly prime, unique divisors of divisors
    Posted in the Number Theory Forum
    Replies: 3
    Last Post: November 24th 2010, 08:40 AM
  2. Proofing
    Posted in the Algebra Forum
    Replies: 4
    Last Post: April 4th 2010, 04:49 AM
  3. Proofing no solution
    Posted in the Discrete Math Forum
    Replies: 1
    Last Post: October 7th 2009, 06:45 AM
  4. Urgent Proofing help needed
    Posted in the Geometry Forum
    Replies: 0
    Last Post: September 29th 2009, 09:24 PM
  5. trig proofing
    Posted in the Trigonometry Forum
    Replies: 1
    Last Post: February 1st 2007, 05:18 AM

Search Tags


/mathhelpforum @mathhelpforum