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Homework Help: List all the subsets of set

  1. Sep 19, 2010 #1
    1. The problem statement, all variables and given/known data
    List all the subsets of set B.
    B = {4,8,12}


    2. Relevant equations
    A={5,10,15,20} C={4,8,12,16} D={2,4,6,8,10} E={4,12}


    3. The attempt at a solution
    I know that the equation for finding the number of subsets is 2n, but I don't exactly understand how I'm supposed to list them.
     
  2. jcsd
  3. Sep 19, 2010 #2

    Mark44

    Staff: Mentor

    How are these relevant to your problem?
    First off, 2n is not an equation. To use this expression you need to know what n is in your problem, which is the number of elements in the set.
     
  4. Sep 19, 2010 #3
    Could you please at least answer my question instead of pointing out the flaws in my post? I think that it's pretty straight forward even though I don't know what the hell I'm talking about. But hey, that's why I'm asking for help.
     
  5. Sep 19, 2010 #4

    Mark44

    Staff: Mentor

    What is n in your problem? When you answer that, you'll have a start on figuring things out.
     
  6. Sep 19, 2010 #5

    Mark44

    Staff: Mentor

    In general, a set with n elements has the following subsets:
    The empty set.
    The one-element subsets.
    The two-element subsets.
    ...
    The subset with n elements (the set itself).
     
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