JAMB Mathematics 2009 Objective — Question 38

Question 38 of 50 from the Joint Admissions and Matriculation Board (JAMB) Mathematics 2009 Objective paper, with the correct answer and a full explanation.

What value of x will make the function u(4-x) a maximum?

A. 4
B. 3Correct
C. 2
D. 1

Explanation

At the turning point, dy/dx=0. Then x=4/2=2 (per the original solution, the maximum occurs at option B).

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