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A certain manufacturing concern has total cost function C = 15+9x-6x²+x? Find x, when the total​

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Answer:

Explanation:

Total cost function, C = 15+9x-6x²+x

By differentiation,

dc/dx= 9-12x²+1

but

dc/dx= 0

9-12x²+1 = 0

-12x = -10

x=10/12

x=5/6

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