Question: 27-30 True-False Determine whether the statement is true or false. Explain your answer. 27. If a curve y = f(x) has a horizontal tangent line

27-30 True-False Determine whether the statement is true or false. Explain your answer. 27. If a curve y = f(x) has a horizontal tangent line at x = a, then f '(a) is not defined

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