已知某产品产量P(t)的变化率为P'(t)=2t+3,其中t表示时间,又P(0)=0,求产量函数P(t).
已知某产品产量P(t)的变化率为P'(t)=2t+3,其中t表示时间,又P(0)=0,求产量函数P(t).
已知某产品产量P(t)的变化率为P'(t)=2t+3,其中t表示时间,又P(0)=0,求产量函数P(t).
(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.
已知某载波信号vo(t)=5cos(2π×50×106t)V,调制信号为vΩ(t)=[2cos(2π×103t)+3cos(3π×103t)]V
求FM表示式和有效频带宽度;求PM信号表示式和有效频带宽度;当F'1=2kHz,F'2=3kHz时,求调频波与调相波。
已知df(x,y)=(x2+2xy-y2)dx+(x2-2xy-y2)dy,求f(x,y).
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