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Which word best describes this formula for the sequence ana_n?\newlinean=2(59)(n+3)+3a_n = -2\left(-\frac{5}{9}\right)^{(n + 3)} + 3\newlineChoices:\newline(A) explicit\newline(B) recursive\newline

Full solution

Q. Which word best describes this formula for the sequence ana_n?\newlinean=2(59)(n+3)+3a_n = -2\left(-\frac{5}{9}\right)^{(n + 3)} + 3\newlineChoices:\newline(A) explicit\newline(B) recursive\newline
  1. Look at the formula: Look at the formula: an=2(59)(n+3)+3a_n = -2(-\frac{5}{9})^{(n + 3)} + 3. Does it use previous terms of the sequence to find the nnth term?
  2. Formula analysis: Since the formula only uses the index nn to find the nnth term and doesn't rely on previous terms, it's not recursive.
  3. Explicit formula determination: The formula directly calculates the nnth term without needing other terms, so it's an explicit formula.

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