A farmer has 1,200 feet of fencing and wants to fence off a rectangular field that borders a straight river. He needs no fence along the river. Write the function that will produce the largest area if x is the short side of the rectangle.

f (x) = 1200x - x2

My answer choice. Is this correct? - >f (x) = - 2x2 + 1200x

f (x) = x2 - 1200

f (x) = 2x2 - 1200

Question

11 June, 14:28

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Answers (1)

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Mattie Hall · Answer 1

You are correct. It would be

f (x) = x (1200-2x) which equates to your selection.