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