证明:若函数f(x,y)在正方形区域D可积,且在点(x0,y0)∈D连续,则
(2)写出供给曲线方程。
(3)如果价格为1000美元,厂商产量为多少?利润水平为多少?在成本曲线图上表示出你的结论。
a. Suppose that a firm's production function is q=9x1/2in the short nun, where there are fixed costs of $ 1000, and x is the variable input whose cost is S 4000 per unit. What is the total cost of producing a level o[ output q? In other words, identify the total cost function C(q)?
b. Write down the equation for the supply curve.
e. If price is $ 1000, how many units will the firm produce? What is the level of profit? Illustrate your answer on a cost - curve graph.
(1)以O1O2连线的中点O为原点,求轴线上坐标为x的任意点的磁感应强度大小;
(2)试证明:当a=R时,O点处的磁场最为均匀。
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