What is the derivative of f(x) = 1x^2 + 5x + 9?
- A. 1x^1 + 5
- B. 2x^1
- C. 2x^2 + 5
- D. 2x + 5 ✓
Correct answer
D. 2x + 5
Explanation
Using the power rule, the derivative of 1x^2 is 2x^1, the derivative of 5x is 5, and the derivative of the constant 9 is 0. So f'(x) = 2x + 5.