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Which recursive formula can be used to define this sequence for n > 1?\newline14,23,32,41,50,59,14, 23, 32, 41, 50, 59, \ldots\newlineChoices:\newline(A) an=an1+9a_n = a_{n-1} + 9\newline(B) an=4123aa_n = \frac{41}{23}a\newline(C) an=an19a_n = a_{n-1} - 9\newline(D) an=an1+an1+9a_n = a_{n-1} + a_{n-1} + 9

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Q. Which recursive formula can be used to define this sequence for n>1n > 1?\newline14,23,32,41,50,59,14, 23, 32, 41, 50, 59, \ldots\newlineChoices:\newline(A) an=an1+9a_n = a_{n-1} + 9\newline(B) an=4123aa_n = \frac{41}{23}a\newline(C) an=an19a_n = a_{n-1} - 9\newline(D) an=an1+an1+9a_n = a_{n-1} + a_{n-1} + 9
  1. Determine Type: Determine if the sequence is arithmetic or geometric.\newlineWe need to check if the difference between consecutive terms is constant (which would make it an arithmetic sequence) or if the ratio between consecutive terms is constant (which would make it a geometric sequence).
  2. Calculate Difference: Calculate the difference between consecutive terms.\newlineThe difference between the first two terms is 2314=923 - 14 = 9. Let's check if this difference is consistent with the next pair of terms: 3223=932 - 23 = 9. It appears that the difference is constant.
  3. Confirm Arithmetic: Confirm that the sequence is arithmetic. Since the difference between consecutive terms is constant, we can confirm that the sequence is arithmetic with a common difference of 99.
  4. Identify Recursive Formula: Identify the recursive formula for the given arithmetic sequence.\newlineFor an arithmetic sequence, the recursive formula is generally of the form an=an1+da_n = a_{n-1} + d, where dd is the common difference. In this case, d=9d = 9.
  5. Match with Choices: Match the recursive formula with the given choices.\newlineThe correct recursive formula based on our findings is an=an1+9a_n = a_{n-1} + 9. Let's match this with the given choices.\newline(A) a=a+9a = a + 9 is incorrect because it lacks the subscript nn to denote the term number.\newline(B) a=4123aa = \frac{41}{23}a is incorrect because it suggests a geometric sequence with a ratio, not an arithmetic sequence with a difference.\newline(C) a=a9a = a - 9 is incorrect because it suggests subtracting 99, not adding.\newline(D) a=a+a+9a = a + a + 9 is incorrect because it suggests adding the previous term to itself and then adding 99, which is not the pattern we observed.\newlineThe correct choice is not explicitly listed, but it is clear that the intended correct choice is (A) with the correct notation: an=an1+9a_n = a_{n-1} + 9.

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