I was hoping someone could help me with this;
Suppose that a firm produces 1 output with n inputs.
The production function equals: y=x1ax2a...xn With 0<a<1.
Derive the cost function of this firm.
As for the original question, it is unanswerable AS POSED. We do not know what type of cost function (total, average, or marginal) is required. Are input prices fixed regardless of quantity? I doubt we have been given the context of the problem.