What is the derivative of f(x) = 9x^5 + 2x + 8?
Difficulty: Medium
About this MCQ
Medium AP Exams item. Correct choice: D. 45x^4 + 2.
- A. 45x^5 + 2
Why not A: “45x^5 + 2” is not 45x^4 + 2.
- B. 9x^4 + 2
Why not B: “9x^4 + 2” is not 45x^4 + 2.
- C. 45x^4
Why not C: “45x^4” is not 45x^4 + 2.
- D. 45x^4 + 2 ✓
Correct answer
D. 45x^4 + 2
Explanation
45x^4 + 2 is the value that answers “What is the derivative of f(x) = 9x^5 + 2x + 8” (option D). Option A (45x^5 + 2) is a different value from 45x^4 + 2. Option B (9x^4 + 2) is a different value from 45x^4 + 2. Option C (45x^4) is a different value from 45x^4 + 2. Keep 45x^4 + 2 as the AP Exams fact for this stem.
Source: Original practice question, MCQsHub
Tags: Using, derivative Using, 2x + 8, 45x^4 + 2
Submitted by: MCQsHub Editorial