Example 7 - Chapter 8 - Predicting What Comes Next: Exploring Sequences & Progress

Last updated at August 12, 2026 by

Example 7 - Is 1, 3, 9, 27, 81, … a geometric progression? [Video] - Geometric Progressions

part 2 - Example 7 - Geometric Progressions - Chapter 8 - Predicting What Comes Next: Exploring Sequences & Progress - Class 9

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Transcript

Example 7 Is 1, 3, 9, 27, 81, … a geometric progression? If so, what is the common ratio? Given sequence 1, 3, 9, 27, 81, … If its GP, then common ratio is same So, we need to show (𝟐^𝒏𝒅 π’•π’†π’“π’Ž)/(𝟏^𝒔𝒕 π’•π’†π’“π’Ž)=" " (πŸ‘^𝒓𝒅 π’•π’†π’“π’Ž)/(𝟐^𝒏𝒅 π’•π’†π’“π’Ž) Now, πŸ‘/𝟏=πŸ‘/πŸ‘ 3 = 3 Since common ratio is same, it is a GP And, Common ratio = r = 3

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