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Math Help - implicit differentiation (I think)

  1. #1
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    implicit differentiation (I think)

    Find an equation of the line tangent to the curve with equation x^2 + xy + y^3 = 1, at the
    point (-1; 1)


    im I right in thinking this is an implicit differentiation problem? I would implicitly find the derivative of the equation and then use point slope formula to wite the equation of the line correct?

    how do I differentiate the above equation?
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  2. #2
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    Re: implicit differentiation (I think)

    Quote Originally Posted by kingsolomonsgrave View Post
    Find an equation of the line tangent to the curve with equation x^2 + xy + y^3 = 1, at the point (-1; 1)

    Yes indeed; 2x+y+xy'+3y^2y'=0. Solve for y'~.
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