JAMB Mathematics 2010 Objective — Question 42
Question 42 of 50 from the Joint Admissions and Matriculation Board (JAMB) Mathematics 2010 Objective paper, with the correct answer and a full explanation.
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42. At what value of x does the function y=-3-2x+x^2 attain a minimum value? A. 4 B. 1 C. -1 D. -4
- A. 4
- B. 1Correct
- C. -1
- D. -4
Explanation
dy/dx = -2+2x = 0 (at turning point). 2x=2, x=1.
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