What is the derivative of f(x) = 7x^4 + 4x + 1?
Difficulty: Medium
About this MCQ
Medium AP Exams item. Correct choice: D. 28x^3 + 4.
- A. 28x^3
Why not A: “28x^3” is not 28x^3 + 4.
- B. 7x^3 + 4
Why not B: “7x^3 + 4” is not 28x^3 + 4.
- C. 28x^4 + 4
Why not C: “28x^4 + 4” is not 28x^3 + 4.
- D. 28x^3 + 4 ✓
Correct answer
D. 28x^3 + 4
Explanation
28x^3 + 4 is the value that answers “What is the derivative of f(x) = 7x^4 + 4x + 1” (option D). Option A (28x^3) is a different value from 28x^3 + 4. Option B (7x^3 + 4) is a different value from 28x^3 + 4. Option C (28x^4 + 4) is a different value from 28x^3 + 4. Keep 28x^3 + 4 as the AP Exams fact for this stem.
Source: Original practice question, MCQsHub
Tags: Using, derivative Using, 8x^3 + 4, 28x^3 + 4
Submitted by: MCQsHub Editorial