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6 September, 17:27

What is the sum of the series?

4+12+36+108 + ... + 8748

8908

10,204

13,120

17,816

+4
Answers (1)
  1. 6 September, 18:27
    0
    4 + 12 + 36 ... etc

    is a sum that can be rewritten in form

    4 (1, 3, 9, 27, 81, etc) this can further be written in sigma notation:

    4 Sigma [ 3 ^ (i - 1) ]

    The sum of the indefinite summation will be the limit as i goes to infinity = infinity
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