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Which word best describes this formula for the sequence ana_n?\newlinean=2an112n2+10n17a_n = 2a_{n - 1} - 12n^2 + 10n - 17\newlineChoices:\newline(A)explicit\newline(B)recursive

Full solution

Q. Which word best describes this formula for the sequence ana_n?\newlinean=2an112n2+10n17a_n = 2a_{n - 1} - 12n^2 + 10n - 17\newlineChoices:\newline(A)explicit\newline(B)recursive
  1. Check Formula: Look at the formula: an=2an112n2+10n17a_n = 2a_{n-1} - 12n^2 + 10n - 17. Does it use the previous term an1a_{n-1}? Yes, it does.
  2. Use of Previous Term: Since the formula uses the previous term a(n1)a_{(n-1)}, it's not just based on the index nn. This means it's not explicit.
  3. Type of Formula: The formula is recursive because it defines each term using the previous term.

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