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Question
Identify the following sequence is in G.P.?
120, 60, 30, 18, …
Solution
120, 60, 30, 18, …
r = `("t"_2)/("t"_1) = ("t"_3)/("t"_2) = ("t"_4)/("t"_3)`
Here r is not equal i.e. `60/120 = 30/60 ≠ 18/30`
∴ It is not a G.P.
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