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What kind of sequence is this?\newline67,85,103,121,67, 85, 103, 121, \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?\newline67,85,103,121,67, 85, 103, 121, \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: 67,85,103,121,67, 85, 103, 121, \ldots\newlineAre the consecutive differences in the sequence equal? \newline8567=1885 - 67 = 18, 10385=18103 - 85 = 18, 121103=18121 - 103 = 18.\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. 85671.2687\frac{85}{67} \approx 1.2687, 103851.2118\frac{103}{85} \approx 1.2118, 1211031.1748\frac{121}{103} \approx 1.1748. The 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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