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Math Help - Domains and Ranges

  1. #1
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    Domains and Ranges

    Could anyone help me find the domains and ranges of this problem? I haven't got the foggiest idea.



    Help please!
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    There are six ordered pairs in S.
    The domain of S is the set of first terms.
    The range of S is the set of second terms.
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  3. #3
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    Quote Originally Posted by Plato View Post
    There are six ordered pairs in S.
    The domain of S is the set of first terms.
    The range of S is the set of second terms.
    Could you elaborate?
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  4. #4
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    In the ordered pair (-1,3) the first term is -1 and the second term is 3.
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  5. #5
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    Quote Originally Posted by Plato View Post
    In the ordered pair (-1,3) the first term is -1 and the second term is 3.
    So for Domain, I've got: -5, -4, -3, 1, 4, 6
    And Range I've got: 5, 1, -7, -4, -3, 2


    Now what? I'm clueless.
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  6. #6
    Forum Admin topsquark's Avatar
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    Do you even know what set notation is? You've got the answer right in front of you!

    -Dan
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  7. #7
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    Quote Originally Posted by topsquark View Post
    Do you even know what set notation is? You've got the answer right in front of you!

    -Dan
    I'll be flat out honest. I haven't had a math class in quite some time. And even then I did poorly in Algebra.
    I'm helping out a friend with their math and this question left both of us stumped.
    So, no, I'm not quite sure what a Set Notation is.

    And so I was wondering if someone could guide me through it, step-by-step so I can keep it in my notes so I can do it myself next time.
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  8. #8
    Forum Admin topsquark's Avatar
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    Quote Originally Posted by tony_rose88 View Post
    So for Domain, I've got: -5, -4, -3, 1, 4, 6
    And Range I've got: 5, 1, -7, -4, -3, 2


    Now what? I'm clueless.
    Your answer for the domain is the set of integers {-5, -4, -3, 1, 4, 6}.

    Your answer for the range is the set of integers {5, 1, -7, -4, -3, 2}.

    (Note that the order of the elements of the sets are unimportant.)

    That's why I was asking: you already had the answer.

    -Dan
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  9. #9
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    Quote Originally Posted by topsquark View Post
    Your answer for the domain is the set of integers {-5, -4, -3, 1, 4, 6}.

    Your answer for the range is the set of integers {5, 1, -7, -4, -3, 2}.

    (Note that the order of the elements of the sets are unimportant.)

    That's why I was asking: you already had the answer.

    -Dan
    Haha, oh. Duh. *smacks head*

    So the order of the sets are unimportant, huh?
    Does that mean for the domain set of integers, I can start with one coordinate and start with a completely different coordinate for the range and have everything mixed up?
    For example:
    Domain: {-7, 2, -5, -3, 1 -4}
    Range: {4, 6, -4, -5, -3}
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  10. #10
    Forum Admin topsquark's Avatar
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    Quote Originally Posted by tony_rose88 View Post
    Haha, oh. Duh. *smacks head*

    So the order of the sets are unimportant, huh?
    Does that mean for the domain set of integers, I can start with one coordinate and start with a completely different coordinate for the range and have everything mixed up?
    For example:
    Domain: {-7, 2, -5, -3, 1 -4}
    Range: {4, 6, -4, -5, -3}
    Since all the answer cares about is the sets, then yes, you can have it all mixed up.

    The set {1, 2, 3, 4} is equal to the set {4, 1, 3, 2} because both sets contain exactly the same elements.

    -Dan
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  11. #11
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    Awesome. Thanks so much. I get it now.

    Sorry about the spam post earlier.
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