A trader realizes 10x - x\(^2\) 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
jamb 1999mathematics

The correct answer is B. 5

y = 10x - x\(^2\)

dy/dx = 10 - 2x

As dy/dx = 0,

10 - 2x = 0

2x = 10

x = 5

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