【简答题】已知函数f(x)=mx+xlnx,曲线y=f(x)在点(1,f(1))处的切线l与直线x+2y=1垂直. (1)求直线l的方程; (2)若n(2x-1)<f(x)对任意 x> 1 2 恒成立,求实数n的取值范围; (3)当b>a>1时,证明(ab 2b ) n >(ba 2a ) b .
【单选题】The primary difference between profit centers and cost centers is that:
A.
Profit centers generate revenue.
B.
Cost centers incur costs.
C.
Profit centers are evaluated using return on investment criteria.
D.
Profit centers provide services to other centers in the organization.
【单选题】在API分类中,液力传动油的牌号有( )。
【判断题】中央预算是指经法定程序批准的中央政府的年度财政收支计划,是中央政府履行职能的基本财力保证。
【判断题】Investment centers include many profit centers.
【单选题】在主机遥控系统中,应急操纵部位应该是()。