Question
How many terms are there in the geometric progression 7,
14, 28, ......, 14336?Solution
Ratio range- Up to 7,14, 28……14336 posts a=7, r=2 Tn = 14336 Tn = arn-1 arn-1 = 14336 7(2)n-1 = 14336 2n-1 = 2048 2n-1 = 211 (comparing powers) n-1=11 n=12.
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