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Class 9 Mathematics Sequences and Progressions Geometric ProgressionEasy

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Which is the general term of the geometric progression (6,18,54,162,\ldots)?

Answer and explanation

Correct answer: (a_n=6\cdot3^{n-1})

The first term is (6) and the ratio is (3) so (a_n=6\cdot3^{n-1}). In exams use (a_n=ar^{n-1}).

Related tags

Sequences Progressions Geometric-Progression Class-9 Easy Geometric Progression Sequences And Progressions Mathematics

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