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What kind of sequence is this?\newline142,122,102,82,142, 122, 102, 82, \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?\newline142,122,102,82,142, 122, 102, 82, \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: 142,122,102,82,142, 122, 102, 82, \ldots\newlineAre the consecutive differences in the sequence equal? \newline122142=20122 - 142 = -20, 102122=20102 - 122 = -20, 82102=2082 - 102 = -20.\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. \newline1221420.8592\frac{122}{142} \approx 0.8592, 1021220.8361\frac{102}{122} \approx 0.8361, 821020.8039\frac{82}{102} \approx 0.8039.\newlineThe ratios between consecutive terms are not equal.
  4. Confirm Not Geometric Sequence: 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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