【Ying Oradee】評論
已知AC=MR= 20。TR=P*Q=(100-2Q)Q=100Q-2Q^2，則MR=100-4Q獨占者追求最大利潤，條件MR=MC。故20=100-4Q，則Q=20，P=100-2Q=60；獨佔利潤為TR-TC=PQ-QxAC=60*20-20*20=800
【我愛阿，阿愛我】評論
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