[問題] 幫我看個題目 ....
If all firms have the same costs of production, then in long-run equilibrium,
a. price exceeds all firms' average cost
b. price exceeds all firms' marginal cost
c. some firms have positive profits
d. all firms have zero profits and just cover thier opportunity cost.
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01/10 23:19, , 1F
01/10 23:19, 1F
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01/10 23:27, , 2F
01/10 23:27, 2F
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01/10 23:33, , 3F
01/10 23:33, 3F
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01/11 00:51, , 4F
01/11 00:51, 4F
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01/11 01:07, , 5F
01/11 01:07, 5F
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01/11 02:02, , 6F
01/11 02:02, 6F
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01/11 02:03, , 7F
01/11 02:03, 7F
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01/11 02:03, , 8F
01/11 02:03, 8F
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01/11 02:04, , 9F
01/11 02:04, 9F
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01/11 02:04, , 10F
01/11 02:04, 10F
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01/11 02:05, , 11F
01/11 02:05, 11F
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01/11 02:05, , 12F
01/11 02:05, 12F
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01/11 02:05, , 13F
01/11 02:05, 13F
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01/11 02:27, , 14F
01/11 02:27, 14F
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01/11 02:37, , 15F
01/11 02:37, 15F