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Which word best describes this formula for the sequence ana_n?\newlinean=6an1+6an3+3an4a_n = -6a_{n - 1} + 6a_{n - 3} + 3a_{n - 4}\newlineChoices:\newline(A)explicit\newline(B)recursive\newline

Full solution

Q. Which word best describes this formula for the sequence ana_n?\newlinean=6an1+6an3+3an4a_n = -6a_{n - 1} + 6a_{n - 3} + 3a_{n - 4}\newlineChoices:\newline(A)explicit\newline(B)recursive\newline
  1. Examine Formula: Look at the formula: an=6an1+6an3+3an4a_n = -6a_{n-1} + 6a_{n-3} + 3a_{n-4}. Does it use previous terms of the sequence to find the nnth term? Yes, it uses an1a_{n-1}, an3a_{n-3}, and an4a_{n-4}.
  2. Implicit vs Explicit: Since the formula depends on previous terms, it's not explicit. An explicit formula would directly calculate ana_n based on nn alone.
  3. Recursion Defined: The formula is recursive because it defines each term using previous terms in the sequence.

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