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甲的效用函数为 U=(X+2)(Y+6) ,X是蛋糕的块数,Y是牛奶的杯数。问 (1)甲原有4块蛋糕,6杯牛奶,若甲给乙3块蛋糕,给他9杯牛奶,愿意进行这宗交易吗 ? 为什么 ? (2)若 MRSxy 是-2,甲愿意为3杯牛奶而放弃一块蛋糕吗?
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