Finding The Sum of an Infinite Geometric Series

Finding The Sum of an Infinite Geometric Series

Finding The Sum of an Infinite Geometric Series

This calculus video tutorial explains how to find the sum of an infinite geometric series by identifying the first term and the common ratio. The examples and practice problems are presented using sigma notation or summation notation.

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35 Responses to “Finding The Sum of an Infinite Geometric Series”

  1. Summer Santos says:

    15:27 why is 9 outside? Why isn't in the numerator??

  2. jhonthen frim says:

    i have an exam in 4 h i pray to gad and u

  3. Carson Barnes says:

    god bless this man

  4. aash syed says:

    3 m subscribers!!!!! I'm excited!!!

  5. Nishad R. says:

    I understood everything in the first 3 minutes, this is a very helpful video

  6. KARTIK DEWAN says:

    why can you not find the sum if the common ratio is higher than 1

  7. Amna Jamal says:

    Can you please explain how you come to the exponential number at the end?

  8. Michael Bell says:

    I'm an engineering student and this guy has officially carried me through my first year.

  9. Jason says:

    I have a test tomorrow oof

  10. Arome Salihu says:


  11. Finlay Humberstone says:

    just a quick thanks for saving my ass… Again…

  12. Yazmyn Knoll says:


  13. ignasXv says:


  14. x says:


  15. Konstantin Peev says:

    Thank you boss

  16. keti sikharulidze says:

    I think everyone here agrees that this guy is the true savior, I'm about to worship him ……

  17. Elijah Cota says:

    Thank you

  18. Elementric says:

    I need your help with this problem : The second term of a sequence is 17 and the sum of the first six terms is 147

    : Determine the first three terms and the nth term. ..

    Please help me. …if you have a video referring to this problem may you please give me the link.

  19. MC says:

    Can i give u a kiss

  20. Batireedui Gantulga says:

    My guy just explained 3-hour teacher lesson that made everybody sleep in just 20 minutes, woow

  21. Aida Sarsenova says:

    Could someone explain why, in the first example, he multiplied the whole equation by 2? When getting the sum

  22. Christian Abiy says:

    Owwww so that's how you do it

  23. Earl Cedric Paler says:

    I didnt get the (8)²

  24. Earl Cedric Paler says:

    I didnt get the (8)²

  25. XELI says:

    To all further maths students: do you know the feeling when you've already studied a subject like this and then forgetting what you've learned years after the years???

    Yeah, that's how I feel rn 🙁

  26. Kathrina Ellema says:

    salamat po lodicakes

  27. Dalandan Lang says:


  28. Paul Robert A. Gilongos says:

    Hello i have a question, if the ratio is above 1, can you or can you not get a sum?

  29. Jossa Desamito says:


  30. jelo espiritu says:

    how did you get the 2?

  31. Wricko Savvi Music says:

    in the last sum i thought the ones being raised to the power of n is the common ratio

  32. Wricko Savvi Music says:

    Why is it regarded to infinite when its end is known

  33. Tamir O says:

    Thank you so much, I finally understand what I'm suppose to do.

  34. tikitiktok says:

    how did he get the 2-1?

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