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.
在 4 和 64 之间插入 3 个等比中项。
在 4 和 64 之间插入 3 个等比中项。
Natural Language
Math Input
Extended Keyboard
