What is the derivative of f(x) = 9x^2 + 7x + 9?
Difficulty: Medium
About this MCQ
Medium AP Exams item. Correct choice: B. 18x + 7.
- A. 18x^1
Why not A: “18x^1” is not 18x + 7.
- B. 18x + 7 ✓
- C. 18x^2 + 7
Why not C: “18x^2 + 7” is not 18x + 7.
- D. 9x^1 + 7
Why not D: “9x^1 + 7” is not 18x + 7.
Correct answer
B. 18x + 7
Explanation
18x + 7 is the value that answers “What is the derivative of f(x) = 9x^2 + 7x + 9” (option B). Option A (18x^1) is a different value from 18x + 7. Option C (18x^2 + 7) is a different value from 18x + 7. Option D (9x^1 + 7) is a different value from 18x + 7. Keep 18x + 7 as the AP Exams fact for this stem.
Source: Original practice question, MCQsHub
Tags: Using, derivative Using, Using power, 18x + 7
Submitted by: MCQsHub Editorial