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Homework Help: Set arithmetic

  1. Feb 26, 2008 #1
    1. The problem statement, all variables and given/known data

    Let A = {1,3,5,6}, B = {3,5} and C = {a,b,c}

    Compute

    a. A - B
    b. B x C (cartesian product)
    c. AB
    d. A(B-A)



    2. Relevant equations

    Table of set computation in text

    3. The attempt at a solution

    a. = {1,6}
    b. = {(1,3,a),(1,3,b),(1,3,c),(1,5,a),(1,5,b),(1,5,c),(3,3,a),(3,3,b),(3,3,c),(3,5,a),(3,5,b),(3,5,c),
    (5,3,a),(5,3,b),(5,3,c),(5,5,a),(5,5,b),(5,5,c),(6,3,a),(6,3,b),(6,3,c),(6,5,a),(6,5,b),(6,5,c)}
    c. = {3,5}
    d. = null set

    First time working with sets, any support helps. Thanks!
     
  2. jcsd
  3. Feb 26, 2008 #2

    quasar987

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    Gold Member

    looks good, provided b. asks you to compute A x B x C and not B x C
     
  4. Feb 26, 2008 #3
    thanks!!
     
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