How to Prove a Sequence Diverges Example with n squared

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  • Опубліковано 25 гру 2024

КОМЕНТАРІ • 29

  • @abstractalien12345
    @abstractalien12345 4 роки тому +10

    Thank you so much! This was so helpful. I knew how to determine if a limit diverges but I wasn't sure how to write a proof. This was exactly what I needed. Greetings from Chicago!

  • @westxlcr
    @westxlcr Рік тому +1

    I appreciate you explaining your strategy after completing the proof. The hard part of Real Analysis is figuring out where to start!

  • @rmbennet
    @rmbennet 2 роки тому +5

    Thank you! Analysis is a pain in the neck. But I say this every semester and I end up doing well just by being engaged in the struggle.

  • @huhwannes9381
    @huhwannes9381 4 роки тому +14

    when u gotta surf at 2 but do ur homework at 3

    • @TheMathSorcerer
      @TheMathSorcerer  4 роки тому +2

      Yeah!

    • @TheMathSorcerer
      @TheMathSorcerer  4 роки тому +6

      I'm gonna go surf now !!!

    • @huhwannes9381
      @huhwannes9381 4 роки тому +1

      @@TheMathSorcerer lmao saving my exam while surfing, u legend!!!

    • @TheMathSorcerer
      @TheMathSorcerer  4 роки тому +10

      I just got back, I saw a SEAL in the water!! A huge head kept popping up staring at me, talk about freaking out hahahahahahs

    • @TheMathSorcerer
      @TheMathSorcerer  4 роки тому +3

      Crazy experience❤️

  • @amzion
    @amzion Рік тому

    This was very useful thanks, I was trying to prove that a sequence was not bounded supposing it was converging but too hard instead of this

  • @hanaaabdullah63
    @hanaaabdullah63 4 роки тому +2

    it was super helpful thank u شكرا

  • @jorgequispe8304
    @jorgequispe8304 2 роки тому

    a very simple example to understand

  • @hanaaabdullah63
    @hanaaabdullah63 4 роки тому +1

    شكرا

  • @diegogomez631
    @diegogomez631 3 роки тому +3

    But can't M be a real positive number? Therefore M+1 is not necessarily an integer.

    • @parrotkoi4048
      @parrotkoi4048 2 роки тому

      If M isn’t an integer, then there’s an integer that lies between M and M+1. For instance, if M=1.5, then between 1.5 and 2.5 is 2.

  • @jacksmoba603
    @jacksmoba603 3 роки тому +1

    Can you solve this for me?➡️
    is diverges to+infinite.
    Plz😒

    • @saudinho1436
      @saudinho1436 3 роки тому

      I know im late. Im doing this more for myself though.
      To prove the sequence a_n = 2^n diverges, let's first suppose it converges. Thus it is bounded. Let's say it's bounded for some M>0
      Then, for all natural n, |a_n|

    • @saudinho-musicas63
      @saudinho-musicas63 3 роки тому

      @@saudinho1436 no man, instead of log_2 M^2, you should use log_2 M+1, cuz M^2>M is not always true.

    • @saudinho-musicas63
      @saudinho-musicas63 3 роки тому

      and not the log itselft. log is not always a natural number, so you pick the smallest integer larger than it.

  • @HuyNguyen-el9tn
    @HuyNguyen-el9tn 4 роки тому +3

    is it me or he looks like Jeff Bezos

  • @oscardavidalarcon2673
    @oscardavidalarcon2673 4 роки тому +2

    ♥️

  • @karma1511
    @karma1511 Рік тому +1

    you look like jeff bezos

  • @jefftaylor8320
    @jefftaylor8320 3 роки тому +1

    Why no epsilon? Just curious.

    • @amzion
      @amzion Рік тому +1

      No need by using the fact that every sequence converging is bounded

  • @mugunthanvin1331
    @mugunthanvin1331 2 роки тому

    Not convergence is not necessary condition for divergence