Question

Find the sum of the first fifteen terms of an arithmetic sequence if the middle term is 92.

Answer 1

I'll try to explain this as much as possible but 92 is x but you don't know y
so it would be dermined this way I hope this makes sense
15-8=7 So, this would mean that the term is 7th in place.
92-7y+92+7y=92+92=184