We prove that the long run cost function is a power function of output, and point out the special relationship between long run marginal cost function and long run average cost function.
文章研究一般性齐次生产函数条件下长期成本函数的确定方法，证明了长期成本函数是关于产量的幂函数，并指出了长期边际成本函数和长期平均成本函数之间的特殊关系。
Herein a general cost function is derived by minimizing the average cost, and thereby the optimum LTPD, AOQL, and IQL plans are determined.
本文研究一般的费用模型，根据费用最小的原则来制定这三类抽样方案。
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