Uh oh! Wolfram|Alpha doesn't run without JavaScript.
Please enable JavaScript. If you don't know how, you can find instructions
here
.
Once you've done that, refresh this page to start using Wolfram|Alpha.
聚星平台网站（网址:QY81.COM）聚星平台网站_聚星平台网站_聚星平台网站_1KLq1Y1YL
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random
