Pre-calc

find the domain of (x+2)/x^3-16x

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  1. all x ^ 3 different of zero

    this mean :

    all x different of zero


    (- infinity , 0 ) U ( 0 , infinity )

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    posted by Bosnian
  2. assuming the usual carelessness with parentheses, I see this as

    (x+2)/(x^3-16x)
    (x+2)/(x(x-4)(x+4))

    so the domain is all reals except 0, -4, 4

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