JAMB Mathematics 2015 Objective — Question 17
Question 17 of 50 from the Joint Admissions and Matriculation Board (JAMB) Mathematics 2015 Objective paper, with the correct answer and a full explanation.
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If y = x² − 3x + 4, find dy/dx at x = 5.
- A. 9
- B. 3
- C. 5
- D. 7Correct
Explanation
dy/dx = 2x−3. At x=5: 2(5)−3 = 7.
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