Need help ASAP with this algebra question

Question

8+9+1300+52+42+12-9+1...

Find the sum S₃ of the series

Answer 1

8+9 + 1300 = 1317.

A partial sum of a sequence, S3 would be the sum of the 1st 3 terms, 8,9 and 1300. the rest of the terms seem to be a distraction of irrelevant terms for purpose of the question.

S1 = 8

S2 = 17

S3 =1317

S4 =1369

S5 = 1411

S6 = 1423

S7 = 1414

S8=1415

It seems like a trick question, where they sort of give you the answer in plain sight, and then distract you with irrelevant numbers.

It's irrelevant what type of series this is, arithmetic, geometric, or whatever. Just add the 1st three terms.