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What kind of sequence is this?\newline161,145,129,113,161, 145, 129, 113, \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?\newline161,145,129,113,161, 145, 129, 113, \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: 161,145,129,113,ext...161, 145, 129, 113, ext{...} Are the consecutive differences in the sequence equal? 145161=16145 - 161 = -16, 129145=16129 - 145 = -16, 113129=16113 - 129 = -16. The 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. Given sequence: 161,145,129,113,ext...161, 145, 129, 113, ext{...} Are the ratios between consecutive terms in the sequence equal? 145161129145113129\frac{145}{161} \neq \frac{129}{145} \neq \frac{113}{129}. The ratios are not equal, so the sequence is not geometric.
  4. Final Conclusion: Based on the findings from the previous steps, we can conclude that the sequence is arithmetic because it has a common difference, and it is not geometric because it does not have a common ratio.

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