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What kind of sequence is this?\newline86,103,120,137,86, 103, 120, 137, \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?\newline86,103,120,137,86, 103, 120, 137, \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: 86,103,120,137,86, 103, 120, 137, \ldots\newlineAre the consecutive differences in the sequence equal? Let's calculate:\newline10386=17103 - 86 = 17,\newline120103=17120 - 103 = 17,\newline137120=17137 - 120 = 17.\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:\newline103861.1977\frac{103}{86} \approx 1.1977,\newline1201031.1650\frac{120}{103} \approx 1.1650,\newline1371201.1417\frac{137}{120} \approx 1.1417.\newlineThe ratios between consecutive terms are not equal.
  4. Conclusion: Since the sequence does not have a common ratio, it is not a geometric sequence. A geometric sequence is defined by having a common ratio between consecutive terms.

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