【简答题】(1)设f(x)=2 x ,g(x)=4 x ,若g[g(x)]>g[f(x)]>f[g(x)],求x的最大取值范围. (2)若函数y=4 x -3?2 x +3的值域为[1,7],求x的取值范围.
【简答题】已知奇函数f(x),偶函数g(x)满足f(x)+g(x)=a x (a>0且a≠1). (1)求证:f(2x)=2f(x)g(x); (2)设f(x)的反函数 f -1 (x),当a= 2 -1 时,比较f -1 [g(x)]与-1的大小,证明你的结论; (3)若a>1,n∈N*,且n≥2,比较f(n)与nf(1)的大小,并证明你的结论.
【多选题】家庭的教育功能包括( )
C.
指导生活目标、形成个人理想与志趣方面发挥影响
【单选题】Johnnys Fitness has begun its summer promotion. For the next three months anyone purchasing a one year fitness membership___1___an additional year free. Each new member will have full access to the sa...
【判断题】熔化焊设备的漏电保护器,应每月检查一次,即操作漏电保护器按钮,检查其是否能正常断开电源。A. 对 B. 错
【简答题】长期债务筹资的方式有哪些?优缺点是什么?
【简答题】请问雷达相对运动船首向上显示方式的特点及适用范围
【简答题】熔化焊设备的漏电保护器,应每月检查一次,即操作漏电保护器按钮,检查其是否能正常断开()。
【单选题】The article is mainly about______.
A.
the psychology of money-spending habits
B.
the purchasing habits of compulsive spenders
C.
a special psychology of bargain hunting
D.
the use of the psychology of spending habits in business
【单选题】14 Which of the following is an element of procurement management: