Geometric Series | Convergence, Derivation, and Example

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  • เผยแพร่เมื่อ 28 พ.ย. 2024

ความคิดเห็น • 54

  • @MrCEO-jw1vm
    @MrCEO-jw1vm 8 หลายเดือนก่อน +2

    Thanks so much, Dr. Bazette. You've opened my mind to the beauty of series, which for years now looked really abstract without understanding. This playlist is so rich and well-delivered. Thank you so much because this confirms that I'm on the right path to majoring in math!

  • @Caleepo
    @Caleepo 4 ปีที่แล้ว +41

    I regret that, I didnt start watching all of your videos before going to college. You don’t know how much this helps me.

    • @abrahamsweetvoice7687
      @abrahamsweetvoice7687 4 ปีที่แล้ว

      Three weeks, after I realised it, but what if r = -1. You get something really strange its like nor diverging and nor converging. Im confused at this point.

    • @TheAS016
      @TheAS016 4 ปีที่แล้ว +4

      @@abrahamsweetvoice7687 That is why you have an absolute value of r. In your case, |-1| is 1, so the sum diverges.

    • @aashsyed1277
      @aashsyed1277 3 ปีที่แล้ว

      @@TheAS016 yeah. but r=-1/2 nothing bad!

    • @duckymomo7935
      @duckymomo7935 ปีที่แล้ว

      at least you had the oopprtunity lol i graduated and he then makes these videos

    • @moodonut
      @moodonut 21 วันที่ผ่านมา

      i’m taking ap calc bc rn 😞 wish me luck

  • @chiomaudoh3154
    @chiomaudoh3154 ปีที่แล้ว +2

    My best TH-camr of the year❤🎉

  • @Lucas-sk5lu
    @Lucas-sk5lu ปีที่แล้ว +8

    5:07 this is the aha moment I needed. Thank you so much!

  • @clementecarbonaro619
    @clementecarbonaro619 หลายเดือนก่อน

    You are helping so much in studying for my Math exam. Thank you so much sir. Teaching is an art, and yours is a masterpiece

  • @charliecho5392
    @charliecho5392 3 หลายเดือนก่อน

    such a legend of a math teacher you are..

  • @alfutures
    @alfutures 4 ปีที่แล้ว +3

    How comes I’m just seeing your videos..... bro your the best

  • @tomasvalenziano9752
    @tomasvalenziano9752 ปีที่แล้ว +2

    Top Tier Professor

  • @emilyboyle4061
    @emilyboyle4061 2 ปีที่แล้ว +10

    This was beautifully explained thank you so much

  • @christianbrown3396
    @christianbrown3396 ปีที่แล้ว +2

    the only part that confuses me is why would the geometric series case of convergence be different than the harmonic series? It seems like the numbers in harmonic are getting infinitely smaller to the point that they are a rounding error, but yet they still diverge. In your harmoinc video it makes sense via the comparison test, but I don't understand how it makes sense when we think about it in terms of it getting infinitely smaller until the subsequent numbers are inconsequential. Thank you

  • @martinkunev9911
    @martinkunev9911 ปีที่แล้ว +3

    It also converges for a = 0

  • @vincemcman4086
    @vincemcman4086 4 ปีที่แล้ว +3

    What is meant by "Ill never get that one unit away, Ill only get half of the unit away..." Does that mean in Ex 2 that you are actually closer?

    • @vincemcman4086
      @vincemcman4086 4 ปีที่แล้ว

      @@DrTrefor this is a great series and in general great channel. Thanks!

  • @charlesAcmen
    @charlesAcmen หลายเดือนก่อน

    unrelated question professor,why is 1/(1+x^2) convergent when x=-1 or x=1?I mean if its not,my textbook must be wrong

  • @maddy4180
    @maddy4180 5 ปีที่แล้ว +7

    wait why can you take out the 1/2 and rewrite it @5:31?

    • @maddy4180
      @maddy4180 5 ปีที่แล้ว +1

      Trefor Bazett thank you!

  • @qntnfeynman360
    @qntnfeynman360 2 ปีที่แล้ว +2

    Thanks dude

  • @marctomasschmidtpujol
    @marctomasschmidtpujol ปีที่แล้ว +2

    Zeno paradox solved!

  • @jadeqochaini2124
    @jadeqochaini2124 2 ปีที่แล้ว +1

    I’m in 6 grade and this guy makes this sound so much easier than other people

    • @krizh289
      @krizh289 2 ปีที่แล้ว +1

      Same I'm in 4th and this is a much better explanation then the one my teacher did using 300 melons

    • @jdavis2921
      @jdavis2921 ปีที่แล้ว +12

      @@krizh289 same, am in kindergarten and really like this guy explains

    • @perelium-x
      @perelium-x ปีที่แล้ว +4

      @@jdavis2921gugu gaga, I'm only 3 and it looks easy to me👶🏻

    • @nithikasamadith3440
      @nithikasamadith3440 2 หลายเดือนก่อน

      lookeathysoeathy....i'm..1old

  • @tasninnewaz6790
    @tasninnewaz6790 4 ปีที่แล้ว +3

    Hey Professor,
    Which branch of mathematics is included sequence and series?

    • @DrTrefor
      @DrTrefor  4 ปีที่แล้ว

      Typically it is introduced in calculus, but had applications in many fields like differential equations

    • @tasninnewaz6790
      @tasninnewaz6790 4 ปีที่แล้ว

      @@DrTrefor Thanks

  • @danielrosen4496
    @danielrosen4496 ปีที่แล้ว +1

    Wondering can U actually multiply an "Infinite" series by a number such as r. How wuld U do it since it's infinite?

    • @heyheyhey0220
      @heyheyhey0220 ปีที่แล้ว +1

      You do it by the distributive property.

  • @ethanvirtudazo1657
    @ethanvirtudazo1657 2 ปีที่แล้ว +4

    Could some please explain why at 5:00, (1/2)^n = (1/2) * (1/2)^n-1

  • @idk-o6s3x
    @idk-o6s3x 3 หลายเดือนก่อน

    Great detailed and concise introduction to convergence and divergence of geometric series.
    Excellent.

  • @ilhem801
    @ilhem801 ปีที่แล้ว +1

    What if n start from 0?!

  • @heyheyhey0220
    @heyheyhey0220 ปีที่แล้ว +2

    What about r=-1 ?

    • @heyheyhey0220
      @heyheyhey0220 ปีที่แล้ว

      And a=0?

    • @axelnils
      @axelnils 11 หลายเดือนก่อน

      No problems, the series converges (as r

  • @jkim9931
    @jkim9931 4 ปีที่แล้ว +1

    excellent!

  • @davidrosenman1889
    @davidrosenman1889 ปีที่แล้ว +1

    U said " if I wanted to go 1 unit away and then a 1/2...". It starts at 1/2, not 1.

  • @secondchanlefullname
    @secondchanlefullname 2 ปีที่แล้ว +1

    Ba ?

  • @jayr72009
    @jayr72009 2 หลายเดือนก่อน

    Bros just straight yapping

  • @frenchmike
    @frenchmike 4 ปีที่แล้ว +3

    everything is high quality but i can never comprehend you cos u run through everything so fast. yes i know i can play it slow motion but i shouldn’t have to. i mean i wonder if u would be happy to learn math from a teacher who just run through everything this fast. no time for the brain to process.

    • @DrTrefor
      @DrTrefor  4 ปีที่แล้ว +9

      I appreciate that. I tell my students that my videos are designed to be watched by pausing and reflecting regularly, not full paced the whole way through. I'd try watching WITHOUT taking notes, pausing after a minute or two, and then formulating notes that make the most sense for yourself

    • @emilyboyle4061
      @emilyboyle4061 2 ปีที่แล้ว

      U can literally rewatch things to process it thats what I do

    • @questionstar
      @questionstar 8 หลายเดือนก่อน

      ​@@DrTrefor Meanwhile I have ADHD and I watch lectures at 1.75x speed, lol. Everyone is different, that's why it's great that there's an option to change video speeds.

  • @mbenitez6722
    @mbenitez6722 7 หลายเดือนก่อน

    Not the dot dot dot

  • @herseycokanlamsiz
    @herseycokanlamsiz 2 ปีที่แล้ว

    thanks but why are you shouting im so exhausted watching this video in the middle of the night

  • @meer_arhan
    @meer_arhan หลายเดือนก่อน

    Ganta samajh aa raha 😂😂😂