What is the derivative of f(x) = 9x^5 + 2x + 8?
- A. 45x^5 + 2
- B. 9x^4 + 2
- C. 45x^4
- D. 45x^4 + 2 ✓
Correct answer
D. 45x^4 + 2
Explanation
Using the power rule, the derivative of 9x^5 is 45x^4, the derivative of 2x is 2, and the derivative of the constant 8 is 0. So f'(x) = 45x^4 + 2.