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Which word best describes this formula for the sequence ana_n?\newlinean=3an15an2+4n11a_n = -3a_{n - 1} - 5a_{n - 2} + 4n - 11\newlineChoices:\newline(A)explicit\newline(B)recursive\newline

Full solution

Q. Which word best describes this formula for the sequence ana_n?\newlinean=3an15an2+4n11a_n = -3a_{n - 1} - 5a_{n - 2} + 4n - 11\newlineChoices:\newline(A)explicit\newline(B)recursive\newline
  1. Examine Formula: Look at the formula: an=3an15an2+4n11a_n = -3a_{n-1} - 5a_{n-2} + 4n - 11. Does it use previous terms of the sequence? Yes, it uses an1a_{n-1} and an2a_{n-2}.
  2. Identify Formula Type: Since the formula uses previous terms, what type of formula is it?\newlineIt's a recursive formula because it defines each term using the previous ones.
  3. Final Answer: So, what's the answer to the question prompt?\newlineThe word that best describes the formula is "recursive".

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