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.
lim
x
mm-template-arrow-right-8
4
4
-
x
x
-
6
x
-
8
Math Input
Natural Language
Math Input
