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Math Help - Venn diagram question from a beginner

  1. #1
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    Venn diagram question from a beginner

    Hi please could anyone help me with this homework question?

    i...Determine the elements of the sets
    A={x | x\varepsilon N, 2 < x 5}

    B={n | nN, n=x+3, x \varepsilon A}

    ii...Given that n(AxB) = n(A) x n(B) what is the value of n(AxB) .

    Thanks
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  2. #2
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    Quote Originally Posted by bertha23 View Post
    Hi please could anyone help me with this homework question?

    i...Determine the elements of the sets
    A={x | x\varepsilon N, 2 < x 5}

    B={n | nN, n=x+3, x \varepsilon A}
    ii...Given that n(AxB) = n(A) x n(B) what is the value of n(AxB) .
    I know that A=\{3,4,5\}.
    But I have no idea what B=\{n| nN,~x=x+3,~x\in A\} means.
    In particular: the nN part.
    Can you clear up the notation?
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  3. #3
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    Hi sorry my mistake

    B={n | n\varepsilon N, n=x+3, x \varepsilon A}
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  4. #4
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    Quote Originally Posted by bertha23 View Post
    Hi sorry my mistake
    B={n | n\varepsilon N, n=x+3, x \varepsilon A}
    Why not learn to post in symbols? You can use LaTeX tags
    [tex]B=\{n: n\in N,~n=x+3,~x\in A\}[/tex] gives  B=\{n: n\in N,~n=x+3,~x\in A\} .

    Just add 3 to each term if A
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  5. #5
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    Ok thank you for your help
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