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Math Help - Quick Question about set Operation!!

  1. #1
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    Quick Question about set Operation!!

    Question:
    Let A = {a, b, c, d, e} and B = {a, b, c, d, e, f}. Find A - B and B - A?

    How would I do A - B since both have similar letters besides the f in B? What I am seeing in A - B is everything in A but not in B. So would the answer be 0 for A - B? If so would I write it as {0}?
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  2. #2
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    A\backslash B = \emptyset \;\& \;B\backslash A = \{ f\}
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  3. #3
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    Quote Originally Posted by Plato View Post
    A\backslash B = \emptyset \;\& \;B\backslash A = \{ f\}
    I knew what B - A was. So it would automatically be an empty set then for A - B. I gotcha now.

    Thanks Plato
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