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27 February, 13:13

What are the values of a 1 and r of the geometric series? 1 + 3 + 9 + 27 + 81

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Answers (2)
  1. 27 February, 13:56
    0
    a₁ = 1; r = 3

    Step-by-step explanation:

    a₁ represents the first term. It is 1 in this case.

    r represents the common ratio between terms. In this case it's 3 / 1 = 3.
  2. 27 February, 16:22
    0
    a1 = 1

    r = 3

    Step-by-step explanation:

    a1 = first term = 1

    r = common ratio = 2nd term/1st term

    = 3/1

    r = 3
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