搜题请搜索小程序“爱下问搜题”
问题 问答题

设


(Ⅰ)F"(x)；
(Ⅱ)

答案

参考答案：


将第一个积分作积分变量变换t=-u，并将变换后的u仍记为t，并与第三项合并，注意到这两个反常积分都是收敛的，于是


从而

单项选择题

An Enterprise Resource Planning (ERP) is built upon a commercial（）that promises the seamless （）of all the information flowing through the company ─financial, accounting, human resources, supply chain and customer information. In implementation, all ERP systems include several features. The system is installed on a typical database management system. It requires initial setup according to the organization’s process, but it may be（）according to the organization’s unique process requirements through a tool set contained within the ERP applications. Using ERP,（）can be prescribed to automate approval processes through established chains of command. One of the methods used to effect rapid implementation of the ERP system is to conduct concurrent（）sessions during the early stages of ERP implementation.

An Enterprise Resource Planning (ERP) is built upon a commercial（）

A．operating system

B．middleware

C．software package

D．management system
查看答案
单项选择题

关于整烫设备操作的注意事项下面说法错误的是（）。

A.关闭电源后，至少等待5分钟才能打开控制箱面板

B.整烫时不能触摸带高压的部件，以避免使人体受到严重伤害

C.清洁熨烫设备前请关闭电源开关，以免误按开关，导致人体受到伤害

D.熨烫时必须熨烫正面，温度要适宜
查看答案