Question on: JAMB Mathematics - 2009
What value of x will make the function x(4 - x) a maximum?
A
4
B
3
C
2
D
1
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Correct Option: C
x(4 - x)
4x - x2
(\frac{dy}{dx}) = 4 - 2x
(\frac{dy}{dx}) = 0
2x = 4
x = (\frac{4}{2})
= 2
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