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15 April, 12:21

A recursive rule for a geometric sequence is a1=4/9; an=3an-1. What is the explicit rule for this sequence?

Enter your answer in the box. an=

+3
Answers (2)
  1. 15 April, 14:47
    0
    a1=4/9

    r=an/a (nâ’1) = 3

    an=a1r^ (nâ’1) = (4/9) * (3) ^nâ’1
  2. 15 April, 14:53
    0
    The answer is (4/9) (3) ^n-1
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