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    Question

    How many terms are there in the geometric progression 7,

    14, 28, ......, 14336?
    A 18 Correct Answer Incorrect Answer
    B 12 Correct Answer Incorrect Answer
    C 15 Correct Answer Incorrect Answer
    D 10 Correct Answer Incorrect Answer

    Solution

    Ratio range- Up to 7,14, 28тАжтАж14336 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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