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Math Help - The use of an operator

  1. #1
    Senior Member Twig's Avatar
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    The use of an operator

    Hi

    The operator will be called Op

    If a Op b = 3 + ab for all real numbers a and b, then 2 Op (1 Op 3)

    I dont even know where to start..
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  2. #2
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    Quote Originally Posted by Twig View Post
    The operator will be called Op
    If a Op b = 3 + ab for all real numbers a and b, then 2 Op (1 Op 3)
    I dont even know where to start..
    You can't possibly mean that.
    Start with (1 Op 3).
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  3. #3
    Senior Member Twig's Avatar
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    hi

    Hi

    does this mean I make a= 1 and b=3 ?

    then I do the formula, 3 + 1*3 and that times two?
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  4. #4
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    Quote Originally Posted by Twig View Post
    then I do the formula, 3 + 1*3 and that times two?
    No. Say that X=3 + 1*3
    The 2 Op X =?
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  5. #5
    Senior Member Twig's Avatar
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    hi

    Uh, so you mean taking 2 Operators times X?

    I dont really get it
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  6. #6
    Senior Member Twig's Avatar
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    hi

    Hi!

    I solved it, thx for your help!

    Now I get what they´re saying, at first I did NOT interpret the question right so to speak..

    I took 2 Op (3 + 1*3), that gave me -> 3 + 2(3 + 3) = 15
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