Concept explainers
Work carefully Proceed with caution when using implicit differentiation to find points at which a curve has a specified slope. For the following curves, find the points on the curve (if they exist) at which the tangent line is horizontal or vertical. Once you have found possible points, make sure they actually lie on the curve. Confirm your results with a graph.
89. x(1 − y2) + y3 = 0
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Calculus: Early Transcendentals (3rd Edition)
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