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Math Help - Proof Question

  1. #1
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    Proof Question



    Hi guys!

    Any help with the above problem would be really greatly appreciated.

    Many thanks in advance,

    TheMathsDude
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  2. #2
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    Here is an example for part c.
     f = \left\{ {\left( {a,1} \right),\left( {b,1} \right),\left( {c,2} \right),\left( {d,2} \right)} \right\},\,A = \{ a,c\} \,\& \,B = \{ b,d\}
    f\left( A \right)\backslash f\left( B \right) = \emptyset \,\& \,f\left( {A\backslash B} \right) = \left\{ {1,2} \right\} <br /> <br />
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  3. #3
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    Thanks for the help Plato.

    Any other help with the other parts would be very helpful!

    Many Thanks.
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  4. #4
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    Quote Originally Posted by TheMathsDude View Post
    Any other help with the other parts would be very helpful!
    They are just pick-a-points proofs.
    Pick a point in the subset; prove it is in the super set.
    Comeon, show us some of your own work.
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