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What kind of sequence is this?\newline100,82,64,46,100, 82, 64, 46, \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?\newline100,82,64,46,100, 82, 64, 46, \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: 100,82,64,46,100, 82, 64, 46, \ldots Are the consecutive differences in the sequence equal? 82100=1882 - 100 = -18, 6482=1864 - 82 = -18, 4664=1846 - 64 = -18. The consecutive differences in the sequence are equal.
  2. Identify Arithmetic Sequence: Since the differences between consecutive terms 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: 100,82,64,46,100, 82, 64, 46, \ldots Are the ratios between consecutive terms in the sequence equal? 82100=0.82\frac{82}{100} = 0.82, 64820.7805\frac{64}{82} \approx 0.7805, 46640.71875\frac{46}{64} \approx 0.71875. The ratios between consecutive terms are not equal.
  4. Conclude 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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