Ratio & Root Tests | Geometric Series Generalized

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  • เผยแพร่เมื่อ 18 ธ.ค. 2024

ความคิดเห็น • 41

  • @adamsusel3801
    @adamsusel3801 4 ปีที่แล้ว +22

    That comparison to the r value in a geometric series just made it click for me! I've been looking for an explanation of why this works and now I get it, thank you!

  • @maurocruz1824
    @maurocruz1824 5 ปีที่แล้ว +7

    Your lectures left me clear that my english-listening level sucks, but fortunately mathematics is a universal language. Your way to explain things like these are unique. Thank you so much!

    • @DiegoHerreraNeri
      @DiegoHerreraNeri หลายเดือนก่อน

      Me when I'm watching and indian video and the only thing I know is that they are trying to solve the same problem as me:

  • @shamsadrahman
    @shamsadrahman 4 ปีที่แล้ว +5

    For peeps who only want to watch the Root Test part, 6:40 - Root Test

  • @biggerthaninfinity7604
    @biggerthaninfinity7604 4 ปีที่แล้ว +5

    Wow! Thank you for the best explanation that cleared up everything that I was having troubles with.

    • @DrTrefor
      @DrTrefor  4 ปีที่แล้ว +2

      Glad it helped!

  • @jaimee8177
    @jaimee8177 4 ปีที่แล้ว +6

    Bc of coronavirus my two hour lecture has been replaced w this 9 minute video. Good explanation tho

  • @alisavictory2969
    @alisavictory2969 6 หลายเดือนก่อน

    Thank you very much! Very helpful. I like the connection to the geometric series! It clicked with me!

  • @shanelindsay
    @shanelindsay 5 ปีที่แล้ว +4

    Just wanted to say I found your videos looking up stats/discrete math videos. Wanted to say thanks for all the uploads! you deserve so many more viewers. Keep making awesome videos man! you're a CS majors dream!

  • @Ayesha_01257
    @Ayesha_01257 ปีที่แล้ว +2

    Very Well Explained 👍 with full enthusiasm ❤

  • @kiramsamy449
    @kiramsamy449 2 ปีที่แล้ว

    this channel is a gem. thank you so much !

  • @abbasbookwala
    @abbasbookwala 3 ปีที่แล้ว +1

    Great ! Thank you very much. perfect analogy to bring about the intuitive feel

  • @nuclearrambo3167
    @nuclearrambo3167 ปีที่แล้ว

    I think 1 is inconclusive because there may be a horizontal asympote whose has height(y value) is not zero. I concluded that because if r value is 1 then there is no change in successive values of the serie then it will look like a horizontal asymptote. example: sigma sum from 1 to infinity ((1/x^2)+(1))

    • @nuclearrambo3167
      @nuclearrambo3167 ปีที่แล้ว

      In the other words it will behave like as if there is a infinitely long rectangle.

  • @biggerthaninfinity7604
    @biggerthaninfinity7604 4 ปีที่แล้ว +4

    You’re a great teacher!

  • @khloetran69
    @khloetran69 4 ปีที่แล้ว +2

    Great video thank you

  • @Tferdz
    @Tferdz 5 ปีที่แล้ว

    I never saw this analogy. Cool video

  • @faoizashraf1027
    @faoizashraf1027 4 ปีที่แล้ว

    amazing teaching skills ...... lucky to have you : )

  • @gardenmenuuu
    @gardenmenuuu 3 ปีที่แล้ว +1

    2:32 sir why is the third case inconclusive?Doesn't that imply that it is similar to geometric ratio with r=1,then it is too divergent?Please help

    • @theleviathan3902
      @theleviathan3902 2 ปีที่แล้ว

      That means that as you go to infinity, you end up getting closer to multiplying by 1 every single term, this could mean convergence or divergence since we have no other info

  • @jharnamandal2855
    @jharnamandal2855 5 ปีที่แล้ว

    Very nice video

  • @amirhussein3953
    @amirhussein3953 2 ปีที่แล้ว

    Thank you for the explanation. Can you please show how sum(1/n) diverges? I think it should converge to 0

    • @theleviathan3902
      @theleviathan3902 2 ปีที่แล้ว

      You add them all up, the sequence goes to zero but if you add them all up it divereges

  • @tonymunene1592
    @tonymunene1592 2 ปีที่แล้ว

    But doesnt the series converge for r=1?? for the explanation at 0.42

    • @umutyalcindag
      @umutyalcindag 2 ปีที่แล้ว

      r=1 makes the series like a+a+a+a+… so it diverges

  • @DamianWaynes
    @DamianWaynes ปีที่แล้ว

    Important note: the root test should have an absolute value inside the nth root!

  • @GrantGryczan
    @GrantGryczan 4 ปีที่แล้ว

    Great intuitive explanation, relating these tests to the geometric series. Where did you get it from? Or did you come up with it yourself?

    • @GrantGryczan
      @GrantGryczan 4 ปีที่แล้ว

      @@DrTrefor Ha, alright then. Well it aint in my textbook

  • @chawankonjela8627
    @chawankonjela8627 ปีที่แล้ว

    bravo🙌🙌

  • @dipsaha6178
    @dipsaha6178 2 ปีที่แล้ว

    Sir I want the explanation of "the root test is more powerful than the
    ratio test."

  • @eduvazx
    @eduvazx ปีที่แล้ว

    Broo, the subtitles LMAOO

  • @Maria-yx4se
    @Maria-yx4se 2 ปีที่แล้ว

    sir you forgot to put absolute value for the root test

  • @sirlewis3975
    @sirlewis3975 ปีที่แล้ว

    i love you

  • @tokerrrre
    @tokerrrre 10 หลายเดือนก่อน

    7.49 :)))))

  • @shanem3014
    @shanem3014 7 หลายเดือนก่อน

    the explanation of factorial algebra couldve been simpler

  • @amanjadnan8466
    @amanjadnan8466 5 ปีที่แล้ว

    Please go faster my teacher rich to chapter 11😥

  • @endy_011
    @endy_011 ปีที่แล้ว

    amogus

  • @nikobaka5272
    @nikobaka5272 4 ปีที่แล้ว

    Literally every woman: (blah)^n