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.
隔板法： x + y + z = 10 ， x, y, z >= 0 。多少解？（答： \binom122 = 66 。）
隔板法： x + y + z = 10 ， x, y, z >= 0 。多少解？（答： \binom122 = 66 。）
Natural Language
Math Input
Extended Keyboard
