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Math Help - Proving set theories

  1. #1
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    Proving set theories

    If A,B,C,D are sets, is (A U B) X (C U D)= (A X C) U (B X D).

    how can i decide if this is a true statement?
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  2. #2
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    Quote Originally Posted by nikie1o2 View Post
    if a,b,c,d are sets, is (a u b) x (c u d)= (a x c) u (b x d). How can i decide if this is a true statement?
    false.
    A=\{1\},~B=\{2\},~C=\{3\},~D=\{4\}.
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