A firm has the following average cost function:
AC = 50+10/Q
(a) Show by differentiation that AC decreases indefinitely as Q
increases. Give an economic interpretation of this phenomenon
(b) Write down the equation for total cost. Hence, write down the
equation for total variable cost and average variable costs. State the
value of fixed costs.
(c) Write down the equation for marginal costs. Comment on the
relationship between TC and MC in this example.
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