{{
`${userDetail.user.displayName}${userDetail.user.cachedBungieGlobalDisplayNameCode ? `#${standardizeBungieGlobalCode(userDetail.user.cachedBungieGlobalDisplayNameCode)}` : ""}`}}
{{getUserClans()}}
11/13/2013 10:57:12 PM
2
Sigma Notation Help
So I'm supposed to write a sum in sigma notation. The sum is as follows:
1 - x + x^2 - x^3 + ... + (-1^n)(x^n)
Now I'm think I have the answer, but I'm not sure.
The lower limit would be i = 1.
The rule would be ((-1^i)(x^i)) / x.
The upper limit would be n
The upper limit is what I'm most confused about. Can anyone tell me if what I have is correct? (probably futile to ask here)
