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Math Help - graphing help

  1. #1
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    Question algebra and trigonometry with analytic geometry problem

    If f(x)=x(x+3)(x-1), use interval notation to give all values of x where f(x)>0. My answer would be (0,1) u (3,infinity) but not sure. thanks for checking.
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  2. #2
    Grand Panjandrum
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    Quote Originally Posted by kwtolley
    If f(x)=x(x+3)(x-1), use interval notation to give all values of x where f(x)>0. My answer would be (0,1) u (3,infinity) but not sure. thanks for checking.
    The roots of f(x) are: -3,\ 0,\ 1. f(x) goes to +\infty as x \to \infty and
    to -\infty as x \to -\infty, so the set of values for which f(x)>0 is:

    <br />
(-3,0) \cup (1,\infty)<br />

    RonL
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  3. #3
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    Smile answer

    thanks for looking at this problem, I see now where I messed this question.
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