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What kind of sequence is this?\newline50,55,60,65,50, 55, 60, 65, \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?\newline50,55,60,65,50, 55, 60, 65, \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: 50,55,60,65,50, 55, 60, 65, \ldots\newlineAre the consecutive differences in the sequence equal? \newline5550=555 - 50 = 5, 6055=560 - 55 = 5, 6560=565 - 60 = 5.\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. \newline5550=1.1\frac{55}{50} = 1.1, 6055=1.0909\frac{60}{55} = 1.0909\dots, 6560=1.0833\frac{65}{60} = 1.0833\dots\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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