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Math Help - Proving

  1. #1
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    Post Proving

    Our professor asked us to show/prove this: "If A, then B.". We already did everything that we could to answer the given problem; but still we couldn't get the answer.
    There really an answer to this??

    thanks in advance...
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  2. #2
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    Quote Originally Posted by mamen View Post
    Our professor asked us to show/prove this: "If A, then B.". We already did everything that we could to answer the given problem; but still we couldn't get the answer.
    There really an answer to this??
    As written it is a nonsense question.
    Did you leave critical information out? What are A & B?
    If A is false then "If A then B" is true regardless of what B is.
    If B is true then "If A then B" is true regardless of what A is.
    The only time then "If A then B" is false is when A is true and B is false.
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  3. #3
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    Sir, I guess the statement was this: "Given A, show B." Does it make sense now? thanks sir..
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  4. #4
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    Quote Originally Posted by mamen View Post
    Sir, I guess the statement was this: "Given A, show B." Does it make sense now? thanks sir..
    NO
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  5. #5
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    Quote Originally Posted by mamen View Post
    Sir, I guess the statement was this: "Given A, show B." Does it make sense now? thanks sir..
    As Plato has already asked, what are A and B? "Given A, show B" is not always possible. For example when A is "x > 0" and B is "x^2 = -25" you cannot possibly show that, given x > 0 that x^2 = -25. It is impossible.

    You need to be much more specific if you expect to have this question answered.

    -Dan
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