Question

Given the sequence in the table below, determine the sigma notation of the sum for term 4 through term 15.
n an
1 4
2 −12
3 36

Answer 1

Sigma notation:
\[\sum_{n = a}^{b}n\]
Where a = the first term, b = the last term. n is what we will sum
Hope this helps :)

Answer 2

thank you!!!!

Answer 3

@johnson0105 did you get the answer? I still don't understand.