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【简答题】
某工厂生产两种产品A和B，出售单价分别为10元与9元，生产x单位的产品A与生产y单位的产品B的总费用是400+2x+3y+0.01(3x 2 +xy+3y 2 )(元)，求取得最大利润时两种产品的产量?
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