What is the derivative of f(x) = 2x^4 + 4x + 8?
- A. 8x^4 + 4
- B. 8x^3 + 4 ✓
- C. 2x^3 + 4
- D. 8x^3
Correct answer
B. 8x^3 + 4
Explanation
Using the power rule, the derivative of 2x^4 is 8x^3, the derivative of 4x is 4, and the derivative of the constant 8 is 0. So f'(x) = 8x^3 + 4.
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