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  1. How many terms are there in the G.P. 3, 6, 12, 24, ... , 384 ?

    2. A.

    8
    B.

    9
    C.

    10
    D.

    11
    E.

    7

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    Answer : Option A

    Explanation :

    Here a = 3 and r =\(\frac {6 } { 3 }\)  2. Let the number of terms be n.

    Then, tn = 384     arn-1 = 384

     3 x 2n - 1 = 384

     2n-1 = 128 = 27

     n - 1 = 7

     n = 8

     Number of terms = 8.

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