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Math Help - Set language and Notation questions

  1. #1
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    Set language and Notation questions


    Hi guys, why is my answer (7) wrong? Please do explain, thank you very much!
    Last edited by FailInMaths; September 10th 2011 at 11:51 AM.
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    Re: Set language and Notation questions

    Quote Originally Posted by FailInMaths View Post
    Attachment 22232
    Hi guys, why is my answer (7) wrong? Please do explain, thank you very much!
    0\le n(A\cap B)\le\min\{n(A),n(B)\}~.
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  3. #3
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    Re: Set language and Notation questions

    hi

    if you read the first line in the pic you will see that it says:"Your answer for Blank 1 '12' is incorrect"
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    Re: Set language and Notation questions

    Quote Originally Posted by anonimnystefy View Post
    hi

    if you read the first line in the pic you will see that it says:"Your answer for Blank 1 '12' is incorrect"
    Well \min\{n(A),n(B)\}=7
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    Re: Set language and Notation questions

    Quote Originally Posted by anonimnystefy View Post
    hi

    if you read the first line in the pic you will see that it says:"Your answer for Blank 1 '12' is incorrect"
    I know what you mean but somehow that bold number is the answer
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    Re: Set language and Notation questions

    Quote Originally Posted by plato View Post
    well \min\{n(a),n(b)\}=7
    edit : -
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  7. #7
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    Re: Set language and Notation questions

    I have a question for you.
    What does n(\varepsilon) mean?
    In forty years, I have never seen that symbol.

    Yes, 7 is the correct answer.
    Because A\cap B\subseteq B that forces n(A\cap B)\le n(B).
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  8. #8
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    Re: Set language and Notation questions

    hi Plato

    i think it represents number of elements in the universal set.
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    Re: Set language and Notation questions

    Quote Originally Posted by Plato View Post
    I have a question for you.
    What does n(\varepsilon) mean?
    In forty years, I have never seen that symbol.
    Universal set, so is my answer right or wrong? I just don't get it!!!!

    Edit: ok.. it's good to hear that my answer was correct, had been thinking for a long while before approaching to this forum. I thought that I could never doubt the system.
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  10. #10
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    Re: Set language and Notation questions

    See reply #7.
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  11. #11
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    Re: Set language and Notation questions

    Quote Originally Posted by Plato View Post
    See reply #7.
    Thanks a lot!
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