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.
x^2/16 + y^2/16 = 1 ——什么圆锥曲线？（答： r=4 的圆。）
x^2/16 + y^2/16 = 1 ——什么圆锥曲线？（答： r=4 的圆。）
Natural Language
Math Input
Extended Keyboard
