What is the derivative of f(x) = 4x^5 + 3x + -4?
- A. 20x^4
- B. 20x^5 + 3
- C. 4x^4 + 3
- D. 20x^4 + 3 ✓
Correct answer
D. 20x^4 + 3
Explanation
Using the power rule, the derivative of 4x^5 is 20x^4, the derivative of 3x is 3, and the derivative of the constant -4 is 0. So f'(x) = 20x^4 + 3.