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[DTube] Geometric Series: Deriving the Summation Formulas

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Published: 14 Jan 2019 › Updated: 14 Jan 2019[DTube] Geometric Series: Deriving the Summation Formulas

[DTube] Geometric Series: Deriving the Summation Formulas

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In this video, we derive the formulas for summing a geometric series, firstly to the nth term and then to infinity.

The formulas are:

  1. Sn = a(rn - 1) / r - 1

  2. S∞ = a / r - 1

We also discuss the concept of convergence and divergence for the geometric series.

Sequences & Series

  1. What are Geometric Sequences?
  2. Modelling Price Inflation with Geometric Sequences
  3. Geometric Sequences: Find the 4th term given the 7th term
  4. Geometric Sequences: Find the first term and common ratio
  5. Geometric Sequences: The Geometric Mean
  6. Geometric Series: Deriving the Summation Formulas

Thanks for watching. Please give me a "thumbs up" if you have found this video helpful.

Please ask me a maths question by commenting below and I will try to help you in future videos.

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