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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
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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

User Zayda
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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
User Edoardoo
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