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Math Help - "The set of rational numbers...."

  1. #1
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    "The set of rational numbers...."

    "The set of rational number is closed under division. -- TRUE OR FALSE"

    I think this is false, but simply cause I read it in my text book (or mis-read it if I am wrong).

    Can someone show me an example?

    Many thanks!
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  2. #2
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    Quote Originally Posted by pleasehelpme12345 View Post
    "The set of rational number is closed under division. -- TRUE OR FALSE"
    I think this is false, but simply cause I read it in my text book (or mis-read it if I am wrong).
    If \left\{ {n,m} \right\} \subseteq \mathbb{Q}\quad \& \quad n \ne 0 then what can you say about \frac{m}{n}?
    What happens if that ratio is not rational?
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  3. #3
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    I have no clue what you just posted!
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    Quote Originally Posted by pleasehelpme12345 View Post
    I have no clue what you just posted!
    Good grief, if that is true, what do you know?
    What do you know about rational numbers?
    Are you trying to get a completely solved, ready to turn in solution?
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  5. #5
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    Not at all, I just don't understand the symbols. Thanks though! I got it.
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