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Math Help - Whats the difference?

  1. #1
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    Whats the difference?

    I was wondering.. What is the difference between:
    (2, infinity) and {x: x > 2}

    And also:
    R^+ union {0} and [2, infinity)

    Are these the same things written differently? And if so, if a question had the answer {x: x > 2} for example, and I wrote [2, infinity) instead, would I get it wrong? (Especially in exams)
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  2. #2
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    Quote Originally Posted by Klutz View Post
    I was wondering.. What is the difference between:
    (2, infinity) and {x: x > 2}
    these two say the same thing

    And also:
    R^+ union {0} and [2, infinity)
    all non-negative real numbers ... x > 2


    Are these the same things written differently? And if so, if a question had the answer {x: x > 2} for example, and I wrote [2, infinity) instead, would I get it wrong? (Especially in exams)
    [2, infinity) includes the value 2 ... x > 2 does not
    ...
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