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Math Help - help with polynomial in calculus

  1. #1
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    Cool help with polynomial in calculus

    How do i find the points of inflection points for f(x)=-x^4/4 -x^3/3 +3x^2-(11)??

    I already found f'(x)=-x^3-x^2+6x
    also I found f"(x)=-3x^2-2x+6
    I know I use the quadratic formula but I am not sure what the values are for a,b,and c.

    If somebody could show me the quadratic formula with the correct values in it, and solved I would appreciate it.
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  2. #2
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    Quote Originally Posted by msimms3570 View Post
    How do i find the points of inflection points for f(x)=-x^4/4 -x^3/3 +3x^2-(11)??

    I already found f'(x)=-x^3-x^2+6x
    also I found f"(x)=-3x^2-2x+6
    I know I use the quadratic formula but I am not sure what the values are for a,b,and c.

    If somebody could show me the quadratic formula with the correct values in it, and solved I would appreciate it.



    You take the coefficients, and constant of your original formula.

    for example, for your 2nd derivative.

    a = 3
    b = -2
    c = 6
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