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Math Help - derivatives

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    derivatives

    For positive constants A and B, the force between two atoms in a molecule is given by the following equation, where r > 0 is the distance between the atoms.



    Find f '(r).


    Find the critical point for f(r).
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    Quote Originally Posted by mer1988 View Post
    For positive constants A and B, the force between two atoms in a molecule is given by the following equation, where r > 0 is the distance between the atoms.



    Find f '(r).


    Find the critical point for f(r).
    rewrite as f(r) = -Ar^{-2} + Br^{-3}

    now use the power rule to find f'(r)

    to find the critical points, set f'(r) = 0 and solve for r
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