Question
3, 12, 48, 192, __________ find which of the following
term is equal to 12288?Solution
G.P. Series: 4, 16, 64, 256 …………….. 16384 Tn = arn – 1 GP Series: 4, 16, 64, 256 __________ 16384 Tn = arn – 1 ⇒ 16384 = 4 × (4)n – 1 ⇒ 4096 = 4 n – 1 ⇒ 46 = 4 n – 1 ⇒ 6 = n – 1 ⇒ n = 7
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