已选分类
经济学
问答题设，B=P-1AP，则B2020-2A2=______．A．B．C．D．E．
问答题设，又α1，α2，α3，α4线性相关，且a≠1，则a=______．A．0B．C．D．2E．-2
问答题国际收支失衡
问答题关于经济增长的决定因素和经济增长过程的特征，新古典增长模型与哈罗德—多马增长模型的见解有什么不同？（15分）
问答题投资饥渴症
问答题令某个生产者的生产函数为，已知K=4，其总值为100，L的价格为10。求：(1)L的投入函数和生产Q的总成本函数、平均成本函数和边际成本函数；(2)如果Q的价格为40，生产者为了获得最大利润应生产多少Q及利润；(3)如果K的总值从100上升到120，Q的价格为40，生产者为了获得最大利润应生产多少Q及利润。
问答题Directions:Studythefollowingpicturecarefullyandwriteanessayof160-200words.Inyouressay,youshould1)describethepicturebriefly,2)interpretthemeaningofthepicture,and3)giveyourcomment.YoushouldwriteneatlyonANSWERSHEET2.[
问答题 Directions: You will soon be leaving the university at which you have studied for several years. Write a farewell speech to your fellows that expresses: 1) your regret at having to leave, 2) your appreciation of their friendship and help over the years, 3) your promise to keep in touch with them in the future. You should write about 100 words on ANSWER SHEET 2. (10 points)
问答题关于曲线的渐近线，下列说法正确的为______．
问答题论述收入弹性和交叉弹性的决定及其经济意义?
问答题Directions : Your company is planning to hold a meeting in a hotel. Write a letter to the hotel manager to 1) book a conference room and 2) ask them to make some necessary preparations. You should write about 100 words on ANSWER SHEET 2. Do not sign your own name at the end of the letter. Use "Li Ming" instead. You don't have to write the address.
问答题期望效用
问答题设A为3阶方阵且|A|=2，则|3A-1-2A*|=______．A．B．C．D．E．1
问答题恩格尔定律
问答题试说明生产函数的边际报酬递减与边际技术替代率递减之间的关系。
问答题设X的概率密度为则方差D(X)=______．
问答题已知方程组无解，则实数a=______．
问答题设函数f(z)在x=2的邻域内可导，且f'(x)=ef(x)，f(2)=1，则f''(2)为______．A．2e3B．e3C．D．-2e3E．3
问答题设可导函数y=y(x)由方程确定，则=______．
问答题设随机变量X的概率分布为P{X=k}=θ(1-θ)k-1，k=1，2，…，其中0＜θ＜1，若，则P{X=3}=______．A．B．C．D．E．