Question

Find the sum of the first 9 terms of the sequence. Show all work for full credit.

2, -7, -16, -25, ...

Please HELP
I GIVE MEDALS

Answer 1

Well, first you have to find the other terms, you're given first four, just keep subtracting 9 from each last term to get the new one, so -25-9 = -34, then -34-9 and so on.

Once you get the first nine terms, find the SUM! (So add them up!)