What is the derivative of f(x) = 5x^4 + 5x + -1?
Difficulty: Medium
About this MCQ
Medium AP Exams item. Correct choice: B. 20x^3 + 5.
- A. 20x^3
Why not A: “20x^3” is not 20x^3 + 5.
- B. 20x^3 + 5 ✓
- C. 5x^3 + 5
Why not C: “5x^3 + 5” is not 20x^3 + 5.
- D. 20x^4 + 5
Why not D: “20x^4 + 5” is not 20x^3 + 5.
Correct answer
B. 20x^3 + 5
Explanation
20x^3 + 5 is the value that answers “What is the derivative of f(x) = 5x^4 + 5x + -1” (option B). Option A (20x^3) is a different value from 20x^3 + 5. Option C (5x^3 + 5) is a different value from 20x^3 + 5. Option D (20x^4 + 5) is a different value from 20x^3 + 5. Keep 20x^3 + 5 as the AP Exams fact for this stem.
Source: Original practice question, MCQsHub
Tags: Derivatives, derivative MCQ, derivative of 5x^3 + 8x + 9, derivative calculation MCQ, find derivative MCQ, derivative questions
Submitted by: MCQsHub Editorial