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_{n\to \infty}\frac{\sum_{k=1}^{2^{n+1}}\sqrt{k}}{2^n\sqrt{2^n}}
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random