What is the derivative of f(x) = 3x⁴? A 12x³ B 3x³ C 12x⁴ D 4x³ ✓ Correct Answer: Option A Using the power rule: d/dx(3x⁴) = 3·4x³ = 12x³. Practice AP Exam Prep Quizzes → Browse All Questions Study Flashcards