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Consider the Sequence Built by the Following Rule A1=1,A2=3,An+1=An+2An1 for n2A _ { 1 } = 1 , A _ { 2 } = 3 , A _ { n + 1 } = A _ { n } + 2 \cdot A _ { n - 1 } \text { for } n \geq 2

Question 80

Multiple Choice

Consider the sequence built by the following rule: A1=1,A2=3,An+1=An+2An1 for n2A _ { 1 } = 1 , A _ { 2 } = 3 , A _ { n + 1 } = A _ { n } + 2 \cdot A _ { n - 1 } \text { for } n \geq 2 What is A4?A _ { 4 } ?


A) 6
B) 10
C) 11
D) 15

Correct Answer:

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