Question: Consider the parabola defined by the equation x 2 - 2 x y + y 2 + 4 x - 8 y + 1 6
Consider the parabola defined by the equation
Use implicit differentiation to find where the graph has horizontal and vertical
tangent lines.
a The parabola has horizontal tangent lines at the points
b The parabola has vertical tangent lines at the point
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