Alright, I think I understand what you're saying. What about the first question with expressing 3^3 - 3^4 + 3^5 - ... - 3^100 as sigma notation? Is there a formula that could be used to acquire the expression for the sigma notation?
Express this in sigma notation?
3^3 - 3^4 + 3^5 - ... - 3^100
Evaluate these two sigmas?
n
∑ (i-2)^2
i =1
n
∑ (4-i^2)
i =1
I don't really understand sigma notation so I'm really interested in the process and explanation of how to do it. Any help would be greatly appreciated!