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.
新2手机登录网址http(网址:QY81.COM)新2手机登录网址http_新2手机登录网址http_新2手机登录网址http_1x1nH1hY
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random