Modeling population with simple differential equation | Khan Academy

Поделиться
HTML-код
  • Опубликовано: 5 ноя 2024

Комментарии • 34

  • @davidsweeney111
    @davidsweeney111 10 лет назад +77

    I did this in school as a kid, chemistry kinetics class - never understood it - until now! and I'm 53 years old now, amazing!!

    • @trashcan7140
      @trashcan7140 4 года назад +4

      Bruh

    • @mohammedouallal2
      @mohammedouallal2 3 года назад +4

      @@trashcan7140 Maybe he meant by Kid "22 years old" :D

    • @CmndX
      @CmndX 3 года назад +9

      Happy 60th birthday

  • @bohiragoto
    @bohiragoto 2 года назад +8

    You should teach mathematics, if not every subject, to every student across all classes through out the globe. The more I see your instructions the more I realize what rubbish had been taught to us. You are doing a stupendous job @ Salman

  • @getinettafesetucho7999
    @getinettafesetucho7999 5 лет назад +5

    Appreciate the great care taken in your teaching, until keeping the colors of the variables in the eqn. Tnx!

  • @peter_roth_8812
    @peter_roth_8812 10 лет назад +37

    If you can not explain it simply. you don't understand it well enough. (A. Einstein)
    But Sal Khan can it.

    • @peter_roth_8812
      @peter_roth_8812 10 лет назад

      ***** Sal Khan is the founder of khanacademy.org and he has the abiltiy to explain math stuff in a simple good way..

    • @ifonlycainwereabel2110
      @ifonlycainwereabel2110 5 лет назад +1

      Right Sal Khan can it

    • @elchinitofeliz1699
      @elchinitofeliz1699 3 года назад

      The guy who is talking is Khan?

    • @tomterific390
      @tomterific390 3 года назад

      @@elchinitofeliz1699 yes

    • @iamlettuce8315
      @iamlettuce8315 3 года назад

      @@ifonlycainwereabel2110 im glad sal khan can it.

  • @namratasethia2439
    @namratasethia2439 Год назад

    A population grows exponentially with growth constant 2. The emigration
    rate (as a function of time) is t
    2. The initial population has size 20000. What will the
    population be at time t in the future?

  • @abdulbasit2571
    @abdulbasit2571 7 лет назад +3

    Thank you so much for the video it helped alot... :)

  • @cmacc6477
    @cmacc6477 6 лет назад +6

    I like how he confused people with insects

  • @shalveshchand9048
    @shalveshchand9048 8 лет назад +1

    Thanks man this was very helpful

  • @nathaliabrahams2495
    @nathaliabrahams2495 Год назад +1

    What is K?

  • @zoozolplexOne
    @zoozolplexOne 3 года назад

    cool !!!

  • @prasunghosh6597
    @prasunghosh6597 5 лет назад

    very helpfull video.

  • @siowhui5029
    @siowhui5029 7 лет назад

    I hope you're my math teacher

  • @epicsineverydaylife
    @epicsineverydaylife 8 лет назад

    how can one determine when to keep the c on the proper side, example how come u kept the constant on the right side and not the left?

    • @DarkLordAli95
      @DarkLordAli95 8 лет назад +1

      because he was going to solve for p.
      you could put the C on the LHS, and then move it to the other side. but why do an extra step?

    • @epicsineverydaylife
      @epicsineverydaylife 8 лет назад

      Ah Thanks i thought it was just keep it on the dependent side but thanks for clearing it up

  • @fredrickongowe4155
    @fredrickongowe4155 5 лет назад +1

    Hi, how can I access the next lesson/ video dealing with example of modelling population

  • @r4zad3
    @r4zad3 8 лет назад +4

    how is e^c become C????? pls answer i dont see any rules of e regarding that

    • @iCJ861
      @iCJ861 8 лет назад +18

      e raised to the power of a constant is just a constant. For example e^3=20.083. So, e^c is a constant which can therefore be rewritten as just c (which represents a constant number) to make things simpler.

    • @djataberk1
      @djataberk1 7 лет назад

      You are so silly. How come you cannot guess that?? Even though he says that...

    • @rishitena2720
      @rishitena2720 6 лет назад

      not everybody are even like you son

    • @iamlettuce8315
      @iamlettuce8315 3 года назад +1

      i got confused by this one too ataberk is rude.

    • @iamlettuce8315
      @iamlettuce8315 3 года назад

      @@djataberk1 part of the reason I didn't guess that is because I am used to solving for c then substituting it back in.

  • @neon4091
    @neon4091 10 лет назад

    and the constant c is the population at time=0

  • @vladimirmisin1876
    @vladimirmisin1876 6 лет назад +1

    But why is it modeling without a double ll ? :O

    • @feynstein1004
      @feynstein1004 5 лет назад +1

      Because the ll operator means that the quantity inside it can be both negative and positive and the brackets smooth out that variation and give only a positive value. But population is a quantity that only has positive values. And so the ll operator isn't necessary.

  • @srm113k
    @srm113k 4 года назад

    Thanks for the videos, however i find it really annoying that you repeat and emphasise unnecessarily. It comes across condescending. We are learning math not english