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Which word best describes this formula for the sequence ana_n?\newlinean=6an1+5an3+8n217a_n = 6a_{n - 1} + 5a_{n - 3} + 8n^2 - 17\newlineChoices:\newline(A) explicit\newline(B) recursive

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Q. Which word best describes this formula for the sequence ana_n?\newlinean=6an1+5an3+8n217a_n = 6a_{n - 1} + 5a_{n - 3} + 8n^2 - 17\newlineChoices:\newline(A) explicit\newline(B) recursive
  1. Examine Formula: Look at the formula: an=6an1+5an3+8n217a_n = 6a_{n-1} + 5a_{n-3} + 8n^2 - 17. Does it use previous terms of the sequence? Yes, it uses an1a_{n-1} and an3a_{n-3}, which are earlier terms in the sequence.
  2. Implicit or Explicit?: Since the formula uses previous terms, it's not explicit. An explicit formula would directly calculate ana_n based on nn alone.
  3. Recursive Definition: The formula is recursive because it defines a term based on previous terms in the sequence.

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