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Homework Help: Continuity and intermediate value theorem

  1. Jan 31, 2015 #1
    f(x) = x^3 - 12x^2 + 44x - 46

    x from 1 to 7

    The attempt at a solution:
    f(1) = -13
    f(2) = 2
    f(4) = 2
    f(5) = -1
    f(6) = 2
    So naturally, the answer should be: (1,2) U (4,5) U (5,6)
    right? Well, it didn't accept this answer. I think there is something wrong with whatever that is accepting the answer... because it seems to be the correct one.
    Even by looking at the graph of the function you'd tell these are the only intervals fitting the criteria...
  2. jcsd
  3. Jan 31, 2015 #2

    Andrew Mason

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    Science Advisor
    Homework Helper

    Maybe it is the way you have formatted your answer.

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