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Math Help - Recursive Deinition of order pairs problem

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    Recursive Deinition of order pairs problem

    Give a recursive definition of each of these sets of ordered pairs of
    positive integers. [Hint: Plot the points in the set in the plane and look for lines
    containing points in the set.]
    a) S={(a,b) | a∈Z+ ,b∈Z+ , and a+b is odd}
    b) S={(a,b) | a∈Z+ ,b∈Z+ , and a∣b}

    ???
    Last edited by dh214; November 5th 2008 at 01:04 PM.
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