1ãå©æ¶¦æ大åçæ¡ä»¶æ¯ï¼MR = MC
èï¼ TR = P Q = (80-0.7Q)Q = 80Q - 0.7Q²
æä»¥ï¼ MR = 80 - 1.4Q
MC = TCâ²=(0.4Q²+ 2Q + 5)â²= 0.8Q + 2
äºæ¯ï¼ 80 - 1.4Q = 0.8Q + 2
解ä¹ï¼ Q = 35.45ï¼åä½ï¼
2ãè¾¹é
æ¶ç为0æ¶ï¼æ»æ¶çæ大ï¼ä»¤ï¼MR = 80 - 1.4Q = 0
解ä¹ï¼ Q = 57.14ï¼åä½ï¼
æ¤æ¶ï¼ P = 80 - 0.7Q = 80 - 0.7Ã57.14 = 40ï¼åä½ï¼
TR = PQ = 40Ã57.14 = 2285.6ï¼åä½ï¼
æ»å©æ¶¦= TR â TC
= 2285.6 - (0.4 Ã 57.14² + 2 Ã 57.14 + 5)
= 860.32ï¼åä½ï¼
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