Answer:
-298
Step-by-step explanation:
Given the relation above :
n = 1 through 14
For n = 1
22 - 6(1)
n = 2
22- 6(2)....
Hence, sun of first 14 terms :
(22 - 6*1) + (22 + 6*2) + (22 - 6*3) + (22 - 6*4) + (22 - 6*5) + (22 - 6*6) + (22 - 6*7) + (22 - 6*8) + (22 - 6*9) + (22 - 6*10) + (22 - 6*11) + (22 - 6*12) + (22 - 6*13) + (22 - 6*14)
= - 298
