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4 March, 20:04

What is the sum of the geometric sequence-1 6 - 36 yes there are 7 terms

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Answers (2)
  1. 4 March, 21:13
    0
    -39991'

    Step-by-step explanation:

    We require the sum of 7 terms of the G. S. - 1, 6, - 36 ...

    The common ratio r = 6/-1 = - 6 and the first term = - 1.

    Sum of n terms = a1. (r^n - 1) / (r - 1)

    Sum of 7 terms = - 1 * (-6) ^7 - 1) / (-6 - 1)

    = - 1 * 39991

    = - 39991 (answer).
  2. 4 March, 22:49
    0
    -39991 is the awnser
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