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.
在同一平面上画 f(x) = 2^x 和 g(x) = 2^(-x) 。求它们相交的位置。
在同一平面上画 f(x) = 2^x 和 g(x) = 2^(-x) 。求它们相交的位置。
Natural Language
Math Input
Extended Keyboard