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Express the terms of the following sequence by giving an explicit formula. 9, 12 15, 18, 21 A. u(n) = n + 3, where n
Question
Express the terms of the following sequence by giving an explicit formula.
9, 12 15, 18, 21
A. u(n) = n + 3, where n = 1, 2, 3, 4, . . .
B. u(n) = 6 + 3n, where n = 1, 2, 3, 4, . . .
C. u(n) = 3 + n, where n = 1, 2, 3, 4 . . .
D. u(n) = 3n, where n = 1, 2, 3, 4, . . .
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2021-07-21T19:59:03+00:00
2021-07-21T19:59:03+00:00 1 Answers
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Answers ( )
Answer:
B.
Step-by-step explanation:
The common difference is + 3 so we have an arithmetic sequence.
u(n) = a1 + d(n – 1)
= 9 + 3(n – 1)
= 9 + 3n – 3
= 6 + 3n.