Question

HEELPP PLEAASEE!!!!
What is the sum of the arithmetic sequence 149,135,121,..., if there are 28 terms?

Answer 1

figure out what the sequence is (in this case it is subtract 14) and then find the sum of all those numbers

Answer 2

so i just add to the 28th term?

Answer 3

subtract i mean

Answer 4

yeah pretty much. Im sure there is probably a formula for it if you google it, but I dont know it, sorry

Answer 5

no, add

Answer 6

149 + 135 + 121 + 107 + 93 + 79....... to 28 terms

Answer 7

till the 28th term right ?

Answer 8

yes

Answer 9

why did you put 93 there?

Answer 10

107 - 14 = 93

Answer 11

so then you add them all up?