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How is each term obtained from the previous term in (2,6,18,54,\ldots)?

Answer and explanation

Correct answer: By multiplying by 3

To get 6 from 2, 18 from 6, and 54 from 18, the preceding term is multiplied by 3 each time: \(2\times3=6\), \(6\times3=18\), and \(18\times3=54\). Therefore, multiplying by 3 is correct. Adding 6 works only for the first pair, since \(6+6=12\), not 18. Exam tip: check a sequence rule using at least two consecutive pairs of terms.

Related tags

SequencesGeometric SequenceCommon RatioPattern RecognitionMultiplicationSequences And ProgressionsMathematicsClass 9 Mcq

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