问答题已知完全竞争市场的需求函数为D=6300-400P，短期市场供给函数为SS=3000+150P，某个企业在LAC曲线最低点的价格为6，产量为50，单个企业的成本规模不变。求： (1)市场短期均衡价格与均衡产量； (2)判断该市场是否同时处于长期均衡，求行业内的厂商数量； (3)如果市场的需求函数变为D′=8000-400P，短期供给函数SS′=4700+150P，求市场短期均衡的价格和产量； (4)判断该市场是否同时处于长期均衡，并求行业内厂商数量。

问答题 设随机变量X的分布函数为F(x)，引入函数①F1(x)=F(ax)；②F2(x)=F2(x)；③F3(x)=1-F(-x)；④F4(x)=F(x+a)． 则可以确定也是分布函数的是______．

问答题国家垄断资本主义

问答题 设α1，α2，α3，α4是一个4维向量组，若已知α4可以表示为α1，α2，α3的线性组合，且表示法唯一，则向量组α1，α2，α3，α4的秩为______．

问答题 设函数g(x)可微，h(x)=e1+g(x)，h'(1)=1，g'(1)=2，则g(1)=______．

问答题已知f(x)连续，且f(2)=3，则=______．A．2B．C．D．E．

问答题In these times when market forces appear increasingly complicated and more volatile, it is all the more important to understand the professional jargon and terminology in the market place in order to be able to better make our investment and business decisions. Understanding key economic indicators will assist in the decision making process, providing a snapshot of the current situation and an insight into the future. (46) Each economic indicator tells us something about the economy or inflation. Gross Domestic Product (GDP) is probably the most important report as it is the whole framework where other economic indicators fall under. There are also indicators that are broader tell us about the economy itself rather than the components, e. g. employment figures, leading indicators, money supply figures (M3). Inflation figures, Produce Price Index (PPI) and the Consumer Price Index (CPI) will, in short, inform us of the changes in wholesale prices, cost of consumer (retail) goods and services respectively. An indicator that is useful must be accurate, timely and reliable. It depends entirely on the integrity of the national statistical system responsible. It is vital to know the accurate components of an indicator. We have to be mindful of the limitation of these statistical figures too. Some indicators can be historic or extremely volatile, and therefore their values are reduced. It is better to compare the most recent data with earlier months, or take a moving average for the past 3, 6 or 12 months to smooth the data. It will tell us if there has been a significant change in trend and whether a new direction is under way. Timeliness of an indicator is also significant. (47) Although the reported figures are important, it is crucial to recognize that markets react more to the variance to the consensus forecast than to the absolute change in the indicator. (48) Markets do not like surprises and can be frustrated with volatility upon subsequent revisions to the numbers published, even though significance of the absolute number diminishes with each passing month. The Index of Leading Economic Indicators (L. E. I) in the US acts as an early warning system, telling us when the economy is about to change direction. (49) This composite index of 11 leading indicators has a good record of providing accurate forecasts. The total index performs better as a prediction tool than any of its parts. This monthly figure is available on the last business day of the month and has low volatility. (50) As a general rule, turning points in the economy are signaled by three consecutive months of L. E. I changes in the same direction. This leading indicator is like a lighthouse, giving the rest of the world economies a glimpse of the direction of the' world's largest economy.

问答题随机变量X的概率密度为则X落在内的概率为______．A．B．C．D．E．

问答题 曲线y=x3-3x2+24x-19在拐点处的切线斜率为______．

问答题随机变量ξ的分布函数为F(x)=A+Barctanx，则常数A·B=______．A．B．C．D．E．

问答题一个有盖圆柱形油桶的全面积为定值A，则油桶的直径为______时，油桶的容积最大．A．B．C．D．E．

问答题 设3元非齐次线性方程组Ax=b的两个解为α=(1，0，2)T，β=(1，-1，3)T，且系数矩阵A的秩r(A)=2，则对于任意常数k，k1，k2，方程组的通解可表示为______．

问答题定积分的数值为______．A．B．C．D．E．8

问答题马克思认为利润率有下降的趋势，为什么?

问答题 若点(1，-2)是曲线y=ax3-bx2的拐点，则a+b=______．

问答题信用在资本主义经济中的作用两重性。

问答题设矩阵，B为三阶非零矩阵，且满足AB=0，矩阵B的秩为______．

问答题 设方程x3-6x2+9x+k=0在(-∞，+∞)上恰有两个实根，则常数k可能的取值为______．

问答题设随机变量X的分布函数为则A·B=______．A．B．C．D．E．1

问答题需求价格弹性