What is the derivative of f(x) = 7x^2 + 1x + 9?
- A. 14x + 1 ✓
- B. 14x^2 + 1
- C. 14x^1
- D. 7x^1 + 1
Correct answer
A. 14x + 1
Explanation
Using the power rule, the derivative of 7x^2 is 14x^1, the derivative of 1x is 1, and the derivative of the constant 9 is 0. So f'(x) = 14x + 1.