What is the derivative of f(x) = 4x^5 + 1x + -4?
- A. 20x^4
- B. 20x^4 + 1 ✓
- C. 4x^4 + 1
- D. 20x^5 + 1
Correct answer
B. 20x^4 + 1
Explanation
Using the power rule, the derivative of 4x^5 is 20x^4, the derivative of 1x is 1, and the derivative of the constant -4 is 0. So f'(x) = 20x^4 + 1.
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