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MIT 18.01 Single Variable Calculus (OCW) 13 Online
OpenStudy (anonymous):

At what point of the curve xy=(1-x-y)^2 is the tangent line parallel to the x-axis? Could you help me?

OpenStudy (waynex):

I would recommend doing one of two things. Put this equation in terms of y and then differentiate, or if that is not convenient, implicitly differentiate the equation as is.

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