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What kind of sequence is this?\newline216,201,186,171,216, 201, 186, 171, \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?\newline216,201,186,171,216, 201, 186, 171, \dots\newlineChoices:\newline(A) arithmetic\newline(B) geometric\newline(C) both\newline(D) neither
  1. Pattern Analysis: To determine the type of sequence, we need to look at the pattern of the numbers. Let's check the difference between consecutive terms.\newlineCalculation: \newline201216=15201 - 216 = -15\newline186201=15186 - 201 = -15\newline171186=15171 - 186 = -15
  2. Constant Difference: Since the difference between consecutive terms is constant, this indicates that the sequence is an arithmetic sequence.
  3. Arithmetic Sequence Definition: An arithmetic sequence is defined by having a constant difference between terms, which we have established is 15-15 in this case. This does not fit the definition of a geometric sequence, which requires each term to be obtained by multiplying the previous term by a constant factor.
  4. Sequence Type Determination: Therefore, the sequence is arithmetic, and the correct choice is (A)(A) arithmetic.

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