求教微经

1.A firm has discovered a new kind of dessert called B. It can be produced from paper at 2 marginal cost. Before the firm produce it ,it would have to spend a fixed cost of M . Demand is given by equation q=20-p .And the firm can have a monopoly in the market
Q:Under what condition will the firm produce the dessert


2.if a person has such budget funtion as : income=min[A+2B,2A+B] (A和B前的系数为其各自的价格) 他的无差异曲线是正常的典型的
Q：1.draw the budget constraint line
      2.discuss all the possible cases of his optimum consumption choices

完全不会呀 求教

是不是这样啊~~~仅供参考~~~
1.垄断厂商生产商品，边际成本为2，固定成本为M，需求曲线q=20-p     Q求厂商的最优生产
应该MC=MR求解就好了吧~~~
2. income=min[A+2B,2A+B] (A和B前的系数为其各自的价格) 他的无差异曲线是正常的典型的
Q：1.draw the budget constraint line     是不是分情况画图，估计是折线~~~
      2.discuss all the possible cases of his optimum consumption choices   
好吧~真不确定能帮到~~~