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What kind of sequence is this?\newline124,113,102,91,124, 113, 102, 91, \dots \newlineChoices:\newline(A) arithmetic\newline(B) geometric\newline(C) both\newline(D) neither

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Q. What kind of sequence is this?\newline124,113,102,91,124, 113, 102, 91, \dots \newlineChoices:\newline(A) arithmetic\newline(B) geometric\newline(C) both\newline(D) neither
  1. Verify Consecutive Differences: Let's verify if the differences between consecutive terms are uniform. Given sequence: 124,113,102,91,ext...124, 113, 102, 91, ext{...} Are the consecutive differences in the sequence equal? \newline113124=11113 - 124 = -11, 102113=11102 - 113 = -11, 91102=1191 - 102 = -11. \newlineThe consecutive differences in the sequence are equal.
  2. Identify Arithmetic Sequence: Since the consecutive differences are equal, this indicates that the sequence is an arithmetic sequence. An arithmetic sequence is defined by having a common difference between consecutive terms.
  3. Check for Geometric Sequence: Now, let's check if the sequence could also be geometric by finding the ratios between consecutive terms. \newline1131240.911\frac{113}{124} \approx 0.911, 1021130.903\frac{102}{113} \approx 0.903, 911020.892\frac{91}{102} \approx 0.892. \newlineThe ratios between consecutive terms are not equal.
  4. Final Sequence Classification: Since the sequence has a common difference but not a common ratio, it is an arithmetic sequence and not a geometric sequence.

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