what do you mean exactly?
MC=MR这里说的是当Marginal cost=marginal revenue的时候可以得到最大的profit.Output Marginal Revenue Marginal Cost Addition to profit Total Profit1 40 55 -15 -152 40 42 -2 -173 40 33 7 -104 40 28 12 25 40 31 9 116 40 34 6 177 40 40 0 178 40 49 -9 89 40 60 -20 -12