假设某公司生产的某种商品的销售量N是价格P的函数:N=7500-50P, 10<P<150;成本C是销售量N的函数:C=25000+40N;销售每件商品需要交税10元。据此,每件商品定价P=( )元能使公司获得最大利润。
本题考察初等数学基础知识。N是销售量,P是销售价格。
利润=总收入-总成本-总税收
=销售量*销售价格-成本C-销售量*单件税收=N*P-C-10N=N*P-(25000+40N)-10N=N*(P-50)-25000=(7500-50P)*(P-50)-25000=50*(150-P)*(P-50)-25000
根据高中所学知识,要求y=(150-P)*(P-50)越大收益越大。
根据y=0得到:曲线y与x轴的的两交点为50,150,该曲线为向下的抛物线,最大值在P=(50+150)/2=100时得到。
( )is the process of transforming information so it is unintelligible to anyone but the intended recipient.
As each application module is completed,it undergoes( )to ensure that it operates correctly and reliably.
( )algorithm specifies the way to arrange data in a particular order.
After analyzing the source code,( )generates machine instructions that will carry out the meaning of the program at a later time.
( )can help organizations to better understand the information contained within the data and will also help identify the data that is most important to the business and future business decisions.
浏览器开启无痕浏览模式后,( )依然会被保存下来。
下列协议中,不属于TCP/IP协议簇的是( )。
下列传输介质中,带宽最宽、抗干扰能力最强的是( )。
数控编程常需要用参数来描述需要加工的零件的图形。在平面坐标系内,确定一个点需要2个独立的参数,确定一个正方形需要( )个独立的参数。
某书的页码为1,2,3,...,共用数字900个(一个多位数页码包含多个数字),据此可以推断,该书最大的页码为( )。