What is the derivative of f(x) = 7x^3 + 5x + 2?
- A. 21x^2
- B. 21x^3 + 5
- C. 21x^2 + 5 ✓
- D. 7x^2 + 5
Correct answer
C. 21x^2 + 5
Explanation
Using the power rule, the derivative of 7x^3 is 21x^2, the derivative of 5x is 5, and the derivative of the constant 2 is 0. So f'(x) = 21x^2 + 5.
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