Results 1 to 3 of 3
Like Tree1Thanks
  • 1 Post By SlipEternal

Thread: binary relations 4 parts to this question first one . {

  1. #1
    Member
    Joined
    Mar 2017
    From
    Annabay
    Posts
    198

    binary relations 4 parts to this question first one . {

    Let S = {0,1,2,3,4} Let R be the binary relation on S such that aRb if and only if a+b=3 and a ≤ 3.
    (a) Write this relation down as a subset of the Cartesian product S x S.

    Hmm so it reads {a,b} ∈ R

    so by substitution we say with a sub set
    do we say only{0,3} and {1,2} can be a subset of aRb
    eg:- {0,3}{1,2} ⊆ S ?
    any help would be good thanks
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor
    Joined
    Nov 2010
    Posts
    2,971
    Thanks
    1141

    Re: binary relations 4 parts to this question first one . {

    Not quite. It would be:

    $R=\{(0,3),(1,2),(2,1),(3,0)\} $
    Thanks from bee77
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Member
    Joined
    Mar 2017
    From
    Annabay
    Posts
    198

    Re: binary relations 4 parts to this question first one . {

    Thanks SlipEternal obviously missed the last two sub sets
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Replies: 2
    Last Post: Aug 23rd 2017, 09:57 PM
  2. Replies: 1
    Last Post: Sep 19th 2011, 02:09 PM
  3. Question about Binary relations
    Posted in the Discrete Math Forum
    Replies: 5
    Last Post: Sep 13th 2009, 11:23 AM
  4. Binary Relations
    Posted in the Discrete Math Forum
    Replies: 3
    Last Post: Apr 13th 2008, 11:41 AM
  5. binary relations
    Posted in the Discrete Math Forum
    Replies: 2
    Last Post: Dec 15th 2007, 01:56 PM

/mathhelpforum @mathhelpforum