Post-UTME Mathematics 2012 Objective — Question 5
Question 5 of 11 from the Post-UTME Screening (Post-UTME) Mathematics 2012 Objective paper, with the correct answer and a full explanation.
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The turning point on the curve y=3x^2-9x+12 is
- A. maximum at x=-1.5
- B. minimum at x=1.5Correct
- C. maximum at x=1.5
- D. minimum at x=-1.5
Explanation
dy/dx=6x-9=0, giving x=1.5. Since the coefficient of x^2 is positive, this is a minimum.
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