What is the derivative of f(x) = 9x^2 + 3x + 9?
Difficulty: Medium
About this MCQ
Medium AP Exams item. Correct choice: B. 18x + 3.
- A. 18x^2 + 3
Why not A: “18x^2 + 3” is not 18x + 3.
- B. 18x + 3 ✓
- C. 9x^1 + 3
Why not C: “9x^1 + 3” is not 18x + 3.
- D. 18x^1
Why not D: “18x^1” is not 18x + 3.
Correct answer
B. 18x + 3
Explanation
18x + 3 is the value that answers “What is the derivative of f(x) = 9x^2 + 3x + 9” (option B). Option A (18x^2 + 3) is a different value from 18x + 3. Option C (9x^1 + 3) is a different value from 18x + 3. Option D (18x^1) is a different value from 18x + 3. Keep 18x + 3 as the AP Exams fact for this stem.
Source: Original practice question, MCQsHub
Tags: Using, 8x + 3, 18x^2 + 3, 18x + 3
Submitted by: MCQsHub Editorial