Answer:
The variable n represents the number of the term, such as 1st, 2nd, 3rd, and so on. ... 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 ? ... so on: n=1 n=2 n=3 n=4 n=5 n=6 n=7 n=8 3 9 18 30 45 63 84 108 .
