SOLUTION: Find the maximum profit and the number of units that must be produced and sold in order to yield the maximum profit. Assume that​ revenue,R(x)​, and​ cost,C(x)​, are in tho

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Question 1187308: Find the maximum profit and the number of units that must be produced and sold in order to yield the maximum profit. Assume that​ revenue,R(x)​, and​ cost,C(x)​, are in thousands of​ dollars, and x is in thousands of units.
R(x)=7x-2x^2, C(x)=x^3-3x^2+2x+1

Answer by Boreal(15235)   (Show Source): You can put this solution on YOUR website!
R-C=Profit=-x^3+x^2+5x-1
Take the derivative and set it equal to 0.
-3x^2+2x+5=0=3x^2-2x-5=(3x-5)(x+1)=0
x= 5/3 as only positive root.
f(5/3)=(-125/27)+25/9+25/3-1=(1/27)(-125+75+225-27)=(148/27)=$5.48 thousands
graph this

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