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.
sum_(n=7)^infinity [ (-1)^(n-1)*(n-5) ] / [(n+1)!]
sum_(n=7)^infinity [ (-1)^(n-1)*(n-5) ] / [(n+1)!]
Natural Language
Math Input
Extended Keyboard
