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Review: Recursive Sequence
Explanation
In this question, we must first glean that the value of a
number of this sequence depends on the two prior values (in other words, it's
recursive). That's what the subscript notation is telling us. We want 
,
but we don't have 
,
so we must first find .
Applying the definition,
Now we apply the definition again to get :
The correct answer is (B).
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