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Consider an arithmetic series $S_{n} = n^{2} + 3n$

  • Calculate the second term of this series.
  • The first two terms of this sequence form a geometric sequence. Calculate the sum of the first 6 terms of this geometric sequence.
in Grade 12 Maths by Platinum (78.4k points) | 15 views

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The sum of the first $n$ terms is:

ago by Platinum (54.5k points)
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