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Mathematics 9 Online
OpenStudy (anonymous):

The revenue derived from the production of X units of a particular commodity is: R9x)=(35x-x^2)/(x^2+35) million dollars. What level of production results in manimum revenue? What is the maximum revenue? I get 1st derivative as -35x^2 - 70x + 1225/(x^2+35)^2 Then I get my zero at x=-7 and x=5 Is that correct?

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