If a function f is continuous at a and then the curve y = f(x) has a

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If a function f is continuous at a andlim | f'(x)| = then the curve y = f(x) has a vertical tangent line at a and the equation of the tangent line is x = a. If a is an endpoint of a domain, then the appropriate one-sided derivative is used. Use this information to answer the following questions.

Graph the following curves and determine the location of any vertical tangent lines.

a. x2 + y2 = 9

b. x2 + y2 + 2x = 0

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Calculus Early Transcendentals

ISBN: 978-0321947345

2nd edition

Authors: William L. Briggs, Lyle Cochran, Bernard Gillett

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