What is the derivative of f(x) = 3x^4 + 8x + 5?
Difficulty: Medium
About this MCQ
Medium AP Exams item. Correct choice: D. 12x^3 + 8.
- A. 12x^3
Why not A: “12x^3” is not 12x^3 + 8.
- B. 12x^4 + 8
Why not B: “12x^4 + 8” is not 12x^3 + 8.
- C. 3x^3 + 8
Why not C: “3x^3 + 8” is not 12x^3 + 8.
- D. 12x^3 + 8 ✓
Correct answer
D. 12x^3 + 8
Explanation
12x^3 + 8 is the value that answers “What is the derivative of f(x) = 3x^4 + 8x + 5” (option D). Option A (12x^3) is a different value from 12x^3 + 8. Option B (12x^4 + 8) is a different value from 12x^3 + 8. Option C (3x^3 + 8) is a different value from 12x^3 + 8. Keep 12x^3 + 8 as the AP Exams fact for this stem.
Source: Original practice question, MCQsHub
Tags: Using, derivative Using, Using power, 12x^3 + 8
Submitted by: MCQsHub Editorial