What is the derivative of f(x) = 9x^3 + 4x + 5?
Difficulty: Medium
About this MCQ
Medium AP Exams item. Correct choice: D. 27x^2 + 4.
- A. 9x^2 + 4
Why not A: “9x^2 + 4” is not 27x^2 + 4.
- B. 27x^3 + 4
Why not B: “27x^3 + 4” is not 27x^2 + 4.
- C. 27x^2
Why not C: “27x^2” is not 27x^2 + 4.
- D. 27x^2 + 4 ✓
Correct answer
D. 27x^2 + 4
Explanation
27x^2 + 4 is the value that answers “What is the derivative of f(x) = 9x^3 + 4x + 5” (option D). Option A (9x^2 + 4) is a different value from 27x^2 + 4. Option B (27x^3 + 4) is a different value from 27x^2 + 4. Option C (27x^2) is a different value from 27x^2 + 4. Keep 27x^2 + 4 as the AP Exams fact for this stem.
Source: Original practice question, MCQsHub
Tags: Using, derivative Using, 4x + 5, 27x^2 + 4
Submitted by: MCQsHub Editorial