asked 152k views
23 votes
Write an equation for the nth term of the arithmetic sequence

18, 30, 42, 54, 66,
A. an = 30n + 6
B. an = n + 18
C. an = 12n + 6
D. an = 18n + 12

asked
User Zayda
by
8.4k points

1 Answer

9 votes
The arithmetic sequence is increasing in 12 each time

18, 30, 42, 54, 66
12n 12, 24, 36, 48, 60

To get from 12n to the arithmetic sequence, you add 6 each time

Therefore the answer is C - an = 12n + 6
answered
User Edoardoo
by
7.4k points
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