Rootmaths Courses

一、网课环境要求

1.一台带麦克风和摄像头的电脑(PC或笔记本)

电脑用来创建视频会议，传输上课过程中的声音和图像，以及老师共享的桌面；

2.Internet连接

二、如何进入课程管理系统

1.登录Rootmaths.com。请输入你注册课程时使用的邮箱和密码，点击"LOG IN"按登录到系统：

How to use Rootmaths Virtual Classroom

For teachers, you can redirect to our new course management system with one click:

1.Logon into zz.rootmaths.com, select Tutoring Management->Class List, Click the big button "Redirect To Course Management" from the top left corner:

You will be redirect into the course management system immediately:

2. Click into your course ("here our course is 2022 AMC 10 Summer Camp 18L"),then choose  Virtual Classroom Links->Join Classroom-...->Join Session, you just started the Virtual Classroom, wait there for the students to join your classroom:

3.Like Zoom, you can use the correspondent buttons to control Voice,Video,Screen Sharing,Recording:

4.For the recordings, you just click Start Recording, Stop Recording.

You do not need to upload the videos anymore, the recording files will be presented automatically after you close Rootmaths Classroom.

5.Remember to change recorded file description to match the video file to lecture

As all the recorded video files have the same default name, please change the description to let students search videos easier after the lecture. You can use Lesson 1, Lesson 2,...etc.

That's it, Enjoy!

已知函数有相同的最小值。

(1)求a;

(2)证明：存在直线y=b,其余两条曲线y=f(x)和y=g(x)共有三个不同的交点，且从左到右的三个交点的横坐标成等差数列。

The derivative of is

You can input this as <code>-((2*x*cos(1/(x^2+1)))/(x^2+1)^2)</code>