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Type the missing number in this sequence:\newline11, 33, 99, _\_, 8181

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Find terms of a geometric sequenceright chevron icon

Full solution

Q. Type the missing number in this sequence:\newline11, 33, 99, _\_, 8181
  1. Identify Sequence Type: Is the given sequence geometric or arithmetic? Each term seems to be multiplied by a common ratio to obtain the next number. The given sequence appears to be geometric.
  2. Find Common Ratio: Find the common ratio in the geometric sequence. Two consecutive terms are 11 and 33. 31=3\frac{3}{1} = 3 Common Ratio: 33
  3. Multiply by Common Ratio: We multiply each term by the common ratio to get the next term. \newlineSequence: 1,3,9,____,811, 3, 9, \_\_\_\_, 81 \newlineCommon Ratio: 33 \newlineFind the missing number in the sequence. \newlineThe number before the missing term is 99. \newline9×3=279 \times 3 = 27 \newlineMissing Number: 2727

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