A trader realizes 10x - x2 naira profit from th... - JAMB Mathematics 2000 Question
A trader realizes 10x - x2 naira profit from the sale of x bags on corn. How many bags will give him the desired profit?
A
4
B
5
C
6
D
7
correct option: b
y = 10x - x2
dy/dx = 10 -x
As dy/dx = 0,
10 - 2x = 0
2x = 10
x = 5
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