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12 September, 09:47

The common ratio of a sequence is 1/2. Two terms in the sequence are a5=1 and a8=1/8

first term in the sequence:

recursive rule that describes the sequence:

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Answers (1)
  1. 12 September, 10:36
    0
    First term is 16

    Step-by-step explanation:

    Taking common ratio 'r' and first term 'A',

    The term formula is:

    A*[r^ (n-1) ]

    Since r = 1/2, and the fifth term = 1

    1 = A*[ (1/2) ^ (5-1) ]

    1 = A*[ (1/2) ^4]

    1 = A * (1/16)

    A = 16
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