What is the derivative of f(x) = 5x^5 + 9x + 8?
- A. 5x^4 + 9
- B. 25x^5 + 9
- C. 25x^4
- D. 25x^4 + 9 ✓
Correct answer
D. 25x^4 + 9
Explanation
Using the power rule, the derivative of 5x^5 is 25x^4, the derivative of 9x is 9, and the derivative of the constant 8 is 0. So f'(x) = 25x^4 + 9.
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