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-   -   Domain of a composite function (https://www.askmehelpdesk.com/showthread.php?t=289243)

  • Dec 6, 2008, 10:13 PM
    matdgob
    domain of a composite function
    f(x) = 7x + 49; g(x) = x + 3
  • Dec 7, 2008, 12:52 AM
    Stringer

    Wow, like in the Wizard of Oz, that dropped on me and my toes curled up...

    Stringer
  • Dec 8, 2008, 02:55 PM
    Elisha Grey

    This is not a composite function. If you are asking about
    f(g(x)) = 7g(x) + 49 = 7(x + 3) + 49 = 7x + 70 or
    g(f(x)) = f(x) + 3 = (7x + 49) + 3 = 7x + 52,
    in either case the domain is the entire real numbers--this is the equation of a straight line.
  • Dec 8, 2008, 03:09 PM
    Stringer

    Mag, this new girl needs help with algebra concepts, Itold her you were an expert...

    Hi there

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