Results 1 to 3 of 3

Math Help - List five elements in each of the following sets:

  1. #1
    Newbie
    Joined
    Jan 2013
    From
    United States
    Posts
    16

    List five elements in each of the following sets:

    I am lost in Discrete Mathematics. I do not know what is being asked for these two questions.

    List five elements in each of the following sets:
    2d.) {n N | n2 + n is a multiple of 3}

    List the (distinct) elements in each of the following sets:
    1b.) {x Z | xy = 15 for some y Z}

    I would like verification if this is accurate:
    9a.) List all the subsets of the set {a,b,c,d} that contain:
    i.) four elements - {a,b,c,d}
    ii.) three elements - {a,b,c}, {a,b,d}, {a,c,d}, {b,c,d}
    iii.) two elements - {a,b}, {a,c}, {a,d}, {b,c}, {b,d}, {c,d}
    iv.) one element - {a}, {b}, {c}, {d}
    v.) no elements - {0}
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Senior Member jakncoke's Avatar
    Joined
    May 2010
    Posts
    387
    Thanks
    80

    Re: List five elements in each of the following sets:

    2d) list 5 natural numbers of the form n^2 + n = 3p for some integer  p so one would be  3^2 + 3 = 12 = 3 * 4

    1b) list all the x's such that x*y = 15, for some integer y. so one element of the set is 3, since 3*5 = 15., another is -3, since -3*-5 = 15

    9a)correct.
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Newbie
    Joined
    Jan 2013
    From
    United States
    Posts
    16

    Re: List five elements in each of the following sets:

    Thank you for you assistance and explanations. I am still new to this whole Discrete Mathematics and struggling a bit. The explanations helped to put these questions into perspective.
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. List elements of the set in roster notation
    Posted in the Algebra Forum
    Replies: 2
    Last Post: May 30th 2012, 04:16 AM
  2. [SOLVED] Sets and Elements
    Posted in the Algebra Forum
    Replies: 9
    Last Post: October 1st 2010, 02:39 PM
  3. list the elements in set
    Posted in the Discrete Math Forum
    Replies: 3
    Last Post: April 17th 2010, 05:57 PM
  4. list the elements in sets.
    Posted in the Discrete Math Forum
    Replies: 4
    Last Post: April 16th 2010, 10:54 AM
  5. List elements of order 10
    Posted in the Advanced Algebra Forum
    Replies: 5
    Last Post: September 8th 2007, 07:38 PM

Search Tags


/mathhelpforum @mathhelpforum