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Math Help - [SOLVED] Curve Sketching - vertical asymptotes

  1. #1
    DBA
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    [SOLVED] Curve Sketching - vertical asymptotes

    I have F(x)= x^4 + 4x^3

    I need to find out the vertical asymptotes with

    lim x-> a+ f(x) = + - infinity and

    lim x-> a- f(x) = + - infinity

    With a rational function I set the denominator zero and the x-values I get I use as "a"

    How does this work for a polynomial?

    If I set f(x) = 0 I get for x= 0 and x= 4

    I can not figure out what to do next...
    Any help?
    Thanks
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  2. #2
    DBA
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    I guess I figured it out on my own. Since the function is a polynomial it is defined everywhere and therefore has no vertical asymptote.
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