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Thread: Set language and Notation questions

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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; Sep 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!
    $\displaystyle 0\le n(A\cap B)\le\min\{n(A),n(B)\}~.$
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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 $\displaystyle \min\{n(A),n(B)\}=7$
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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 $\displaystyle \min\{n(a),n(b)\}=7$
    edit : -
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    Re: Set language and Notation questions

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

    Yes, 7 is the correct answer.
    Because $\displaystyle A\cap B\subseteq B$ that forces $\displaystyle n(A\cap B)\le n(B)$.
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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 $\displaystyle 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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    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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