2009
Mathematics
JAMB
What value of x will make the function x(4 - x) a maximum?
A.
4
B.
3
C.
2
D.
1
Correct Answer: 2
Explanation
x(4 - x) 4x - x2 dy/dx = 4 - 2x dy/dx = 0 2x = 4 x = 4/2 = 2
x(4 - x) 4x - x2 dy/dx = 4 - 2x dy/dx = 0 2x = 4 x = 4/2 = 2THIS WEEK's
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