Use a Graphing Utility to Locate All Horizontal Tangent Lines

question 66

Multiple Choice

Use a graphing utility to locate all horizontal tangent lines to the curve y = x³ + 3x² + 12.

• A) x = 0
• B) x = -3 and x = 0
• C) x = -2 and x = 0
• D) x = -2
• E) x = -3

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