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4 votes
Which sequence follows the rule an =an–1 + 7?

A. 11, 18, 25, 32, ...
B. 17, 24, 30, 38, ...
C. –15, –7, 1, 8, ...
D. –9, –2, 4, 9, ...

2 Answers

2 votes

Answer:

A

Explanation:

User Milos Mijatovic
by
8.8k points
5 votes

Answer:

A

Explanation:

using the rule :
a_(n) =
a_(n-1) + 7

sequence A with a₁ = 11

a₂ = a₁ + 7 = 11 + 7 = 18

a₃ = a₂ + 7 = 18 + 7 = 25

a₄ = a₃ + 7 = 25 + 7 = 32

sequence A is generated using the rule

sequence B with a₁ = 17

a₂ = a₁ + 7 = 17 + 7 = 24

a₃ = a₂ + 7 = 24 + 7 = 31

a₄ = a₃ + 7 = 31 + 7 = 38

sequence B is not generated using the rule

sequence C with a₁ = - 15

a₂ = - 15 + 7 = - 8

a₃ = a₂ + 7 = - 8 + 7 = - 1

a₄ = a₃ + 7 = - 1 + 7 = 6

sequence C is not generated using the rule

sequence D with a₁ = - 9

a₂ = a₁ + 7 = - 9 + 7 = - 2

a₃ = a₂ + 7 = - 2 + 7 = 5

a₄ = a₃ + 7 = 5 + 7 = 12

sequence D is not generated using the rule



User Fanfan
by
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