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What kind of sequence is this?\newline11,33,99,297,11, 33, 99, 297, \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?\newline11,33,99,297,11, 33, 99, 297, \dots\newlineChoices:\newline(A) arithmetic\newline(B) geometric\newline(C) both\newline(D) neither
  1. Check Arithmetic Sequence: Let's first check if the sequence is an arithmetic sequence by finding the differences between consecutive terms.\newline11,33,99,297,11, 33, 99, 297, \dots\newlineThe differences are:\newline3311=2233 - 11 = 22\newline9933=6699 - 33 = 66\newline29799=198297 - 99 = 198
  2. Verify Differences: Now, let's check if these differences are the same (which is required for an arithmetic sequence).\newline2222, 6666, 198198, ...\newlineThe differences between these are:\newline6622=4466 - 22 = 44\newline19866=132198 - 66 = 132\newlineThese differences are not the same; therefore, the sequence is not arithmetic.
  3. Check Geometric Sequence: Next, let's check if the sequence is a geometric sequence by finding the ratios between consecutive terms.\newline11,33,99,297,11, 33, 99, 297, \dots\newlineThe ratios are:\newline3311=3\frac{33}{11} = 3\newline9933=3\frac{99}{33} = 3\newline29799=3\frac{297}{99} = 3
  4. Verify Ratios: Now, let's check if these ratios are the same (which is required for a geometric sequence).\newline3,3,3,3, 3, 3, \ldots\newlineThe ratios between consecutive terms are the same; therefore, the sequence is geometric.

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