What is the derivative of f(x) = 7x^3 + 2x + 2?
- A. 21x^2 + 2 ✓
- B. 21x^2
- C. 7x^2 + 2
- D. 21x^3 + 2
Correct answer
A. 21x^2 + 2
Explanation
Using the power rule, the derivative of 7x^3 is 21x^2, the derivative of 2x is 2, and the derivative of the constant 2 is 0. So f'(x) = 21x^2 + 2.
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