Question
The number 8192 is which term in the following geometric
sequence 2, 8, 32, 128, . . . . . . .Solution
Here a = 2 and r = 4 nth term of G.P is an = arn - 1 ⇒ 8192 = 2 x ( 4) n-1 ⇒ 4096 = (4) n - 1 ⇒ (4)6 = (4) n - 1 ⇒ n = 7
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