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Math Help - Writing a proposition in words.

  1. #1
    Mad
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    Writing a proposition in words.

    Let P(x) denote the statement "x is taking a math course." The domain of discourse is the set of all students. Write each proposition in Exercises 28 to 33 in words.

    28. A x P(x) [Mind you, the A is supposed to be the upside down A.]

    The answer in the back of the book is, "Every student is taking a math course." but I don't understand so I'd really appreciate it if someone could explain it to me.
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  2. #2
    Moo
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    Hello,

    A x P(x)

    This means that if you take any "x", the proposition P will be true, that is to say :
    "for every student" A x
    "it is true that the student is taking a math course" P(x)

    This can be reworded "Every student is taking a math course"

    Looks clearer ?
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  3. #3
    Grand Panjandrum
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    Quote Originally Posted by Moo View Post
    Hello,

    A x P(x)

    This means that if you take any "x", the proposition P will be true, that is to say :
    "for every student" A x
    "it is true that the student is taking a math course" P(x)

    This can be reworded "Every student is taking a math course"

    Looks clearer ?
    Well certainly more colourfull

    RonL
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