Question

Find the indicated sum for the arithmetic series.
S18 for 13 + 2 + (-9) + (-20) + ...

Answer 1

13 + (18 - 1) -11

s18 = -174

Answer 2

That is not an option :/ the only options are -873, -1528, -256, and -1449

Answer 3

hmm thats strange

Answer 4

Yeah, Thanks anyways though. I appreciate it greatly.

Answer 5

are you sure you typed the question correctly? if i understand correctly your looking for the 18th term?

Answer 6

No, I'm looking for the sum of the series to the 18th term

Answer 7

ok let me work it out give me a moment

Answer 8

Take your time

Answer 9

-1449

Answer 10

Thank you :)

Answer 11

remember to click good answer Megan :p

Answer 12

your welcome