What exactly is e? Exploring e in 5 Levels of Complexity

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What is e? Let's explore the number e in 5 levels of complexity, ranging from compound interest, to representing e in calculus, to simulating e with probability.
This video was sponsored by Brilliant.
00:00 Introduction
00:12 Level 1: Compound Interest
02:30 Level 2: Probability
03:38 Level 3: Calculus
05:43 Sponsor Message
07:00 Level 4: Pascal's Triangle
09:17 Level 5: Simulating e

Пікірлер: 86

  • @DrSeanGroathouse
    @DrSeanGroathouse7 күн бұрын

    To try everything Brilliant has to offer-free-for a full 30 days, visit brilliant.org/DrSean . You’ll also get 20% off an annual premium subscription.

  • @mohammadmorshed4684
    @mohammadmorshed46846 күн бұрын

    This man explains math in such an intuitive way and his videos are rlly high quality, but he only has 15k subs. Actually underrated fr

  • @ExtraTrstl

    @ExtraTrstl

    6 күн бұрын

    For real. This is some of the most accessible and coherent explanations. Dude is one of the best teachers I’ve ever had.

  • @2kchallengewith4video

    @2kchallengewith4video

    6 күн бұрын

    A very underrated math channel for sure

  • @Tristanlj-555

    @Tristanlj-555

    5 күн бұрын

    One of the rare times “underrated” is used correctly:)

  • @westongunningham7151

    @westongunningham7151

    5 күн бұрын

    I'd just like to say I followed him before 5k

  • @AdityaPutatunda

    @AdityaPutatunda

    5 күн бұрын

    Agreed! The same way your comment needs some vowels

  • @AntoNqnt
    @AntoNqnt4 күн бұрын

    I have a presentation for an important exam in literally 2 days that is exactly about the number e, as well as the exponential function; and a video such as this one truly is appreciated edit : i went crazy with it tysm

  • @linuxp00
    @linuxp00Күн бұрын

    My favorite representation is the Taylor's Series, because it relates e with sine, cosine, i, pi, sinh, cosh and hyperreal calculus. Also, as an infinite series you're mind blown when you see that it's derivative is really itself!

  • @user-jm9tf3uw1p
    @user-jm9tf3uw1p4 күн бұрын

    e is the most insane number I have ever seen. I started learning it yesterday and I was shocked when I realized how versatile e is. For example the derivative of e^x is e^x and e^((x^h-1)/h)=x as h approaches zero

  • @Simpson17866

    @Simpson17866

    2 күн бұрын

    You can approximate e to 18 trillion trillion decimal places using the digits 1-9 once each :D (1 + 9 ^ (-4^ (7*6)) ) ^ (3^2^85)

  • @kavehtehrani
    @kavehtehrani5 күн бұрын

    I'm a math graduate and I find your videos to be educational even to me! Keep up the good work the quality is top notch my friend!

  • @DrSeanGroathouse

    @DrSeanGroathouse

    23 сағат бұрын

    Thanks so much, I'm glad to hear that!

  • @SeanRaleigh
    @SeanRaleigh5 күн бұрын

    Both levels 4 and 5 are mind-blowing. Well done!

  • @S-payanage
    @S-payanage6 күн бұрын

    A letter duh

  • @bemusedindian8571
    @bemusedindian85713 күн бұрын

    Level 5 was mind blowing. Never heard this before.

  • @DrSeanGroathouse

    @DrSeanGroathouse

    Күн бұрын

    I'm glad you liked it! It's probably my favorite

  • @DanielC618
    @DanielC6185 күн бұрын

    Great job! By far the best explanation I found 👏👏👏let's get that KZread algorithm going, this channel needs way more exposure!

  • @Fire_Axus

    @Fire_Axus

    4 күн бұрын

    no

  • @NicholasAngelidis1
    @NicholasAngelidis16 күн бұрын

    another great video!

  • @randyzeitman1354
    @randyzeitman13543 күн бұрын

    Superb. Far away, the best explanation of e.

  • @jaymethodus3421
    @jaymethodus34214 күн бұрын

    E as I use it: Exact; Equivalent; Expression (energy), e^i for 'computational cost' but the most [E]vil way I use it, as to denote exponential constant values, for scaling of base 3/4 calculation expressions into self-similar real-number ratios of irrational "digits" being operated on logarithmically.

  • @AndrewDangerously

    @AndrewDangerously

    3 күн бұрын

    Can you explain this at level 1 and 2?

  • @jaymethodus3421

    @jaymethodus3421

    3 күн бұрын

    @@AndrewDangerously It would require an exponential amount of text. Do you describe that 'amount' of that text using units derived from paragraphs? from words? from characters? From sentences? Pixel on/ off rate? The various electrical circuitry quantitues, taking their own exponential functions into account of this unknown value exponent? See, 0,1, and 2, are not real. 3 is where the real value baseline begins, as far as the instructional code for reality. 012 is a *continuum constant* that acts as a function instructing relative operational order of value exchange between real quantities. Dimensions aren't real. Yet trigonometry is extremely correlative to the deep-scaling of that very concept. Idk what to call my theory yet, but seems to be very well supported by every stone I turn over in my expansive search.

  • @jaymethodus3421

    @jaymethodus3421

    3 күн бұрын

    @@AndrewDangerously Uhh. I tried... So 1^2 is 1. Terrence Howard really screwed me on this shit ngl lol.... but he's crazy. And I'm both/neither. He is onto something deeply irreducible about the discrepencies of '1', '0', and 2; to the exponent of the discrepancies from using -=X/ as our 4 highest order "math operations". 1 is actually an irreducible scale unit that represents an infinitely irreducible and unique value composed of higher and lower order integral values as they are ALL, mutually calculated. In %base10linear: 1=sqrt(-2)

  • @jaymethodus3421

    @jaymethodus3421

    3 күн бұрын

    @@AndrewDangerously How's that for level 1 and 2? Pun intended lol

  • @jaymethodus3421

    @jaymethodus3421

    3 күн бұрын

    Terrence has glimpses and he's high EQ, he knows what he saw, and he just runs with it. But he has no idea wtf he's talking about it what it actually means, or when and where to actually appy it without sounding like a snake oil salesman.

  • @SobTim-eu3xu
    @SobTim-eu3xu6 күн бұрын

    Great video, I love it❤

  • @hamedajab2483
    @hamedajab24835 күн бұрын

    Quality is absolutely crazy

  • @eliteteamkiller319
    @eliteteamkiller3192 күн бұрын

    I love this channel so much.

  • @DrSeanGroathouse

    @DrSeanGroathouse

    Күн бұрын

    Thanks so much! I'm glad you like it

  • @guglielmotranchina249
    @guglielmotranchina2495 сағат бұрын

    McLovin's smart doppelganger

  • @DingleTwit
    @DingleTwit5 күн бұрын

    The derivative part of level 3 made me literally put down my book and go “whoa” when I read it. That’s the version that finally made e click for me.

  • @andrealves6545
    @andrealves65456 күн бұрын

    The last one took me by surprise ahah

  • @Neodynium.the_permanent_magnet
    @Neodynium.the_permanent_magnet6 күн бұрын

    Yeah, baby, yeah!

  • @yawninglion
    @yawninglion3 күн бұрын

    I was expecting the final level to be some circles in the complex plane.

  • @Skellborn
    @Skellborn5 күн бұрын

    I'm sorry, i dont get the Limit at 5:30: e^x lim((e^h-e^0)/h) is 0/0 for h-> 0. Meaning you have to do l'hospital. But dir this you have to differentiate e^x and you start all over again. How do you know it's 1? By stating it 1min earlier?

  • @joelganesh8920

    @joelganesh8920

    5 күн бұрын

    As stated in the video, the limit is the definition of the derivative of e^x at x=0, which was already assumed to be 1.

  • @sachavalette1437

    @sachavalette1437

    Сағат бұрын

    exp is the reciprocal function of ln so its derivative is 1/f’(f^-1(x)) = 1/(1/exp(x)) = exp(x). This is how to prove it.

  • @Fractured_Scholar
    @Fractured_ScholarСағат бұрын

    Care to do a Level 6 for Rotors?

  • @infinityleleveling
    @infinityleleveling4 күн бұрын

    There are more ways to intuitively think about e. My favorite is the “e is the image of 1 by the exponential function” approach. But for that to really make sense, you would have to really understand what we mean by the exponential function and its many definitions. The exponential function can be defined as the inverse of the natural logarithm, but I find this definition to be superior: the only function whose derivative is equal to itself and is 1 at 0.

  • @jeremyi4693
    @jeremyi46935 күн бұрын

    In high school calculus, our teacher taught us a mnemonic device for the approximate value of e. Think of a picture of Andrew Jackson in a square frame with a diagonal line from one corner to the other corner. Andrew Jackson served 2 terms, he was the 7th president, he was first elected in 1828, because he had 2 terms, we use 1828 twice. And the angles in the frame are 45-90-45. So, 2.718281828459045

  • @bsbrawl1653

    @bsbrawl1653

    5 күн бұрын

    😮 cool

  • @ianbennett2443

    @ianbennett2443

    5 күн бұрын

    unfortunately, i know more about integrals than i do us history

  • @andyghkfilm2287

    @andyghkfilm2287

    3 күн бұрын

    Agh but what if I don’t know what Andrew Jackson looks like??

  • @jeremyi4693

    @jeremyi4693

    2 күн бұрын

    ​@andyghkfilm2287 think of a square with the name Andrew Jackson written in it.

  • @carultch

    @carultch

    3 сағат бұрын

    @@andyghkfilm2287 He's on the most common printed bank note of US currency. He's Mr $20 Bill.

  • @orologioimpazzito
    @orologioimpazzito5 күн бұрын

    Why you look like Sheldon´s brother 😀

  • @carultch

    @carultch

    3 сағат бұрын

    He doesn't look anything like Georgie.

  • @orologioimpazzito

    @orologioimpazzito

    Сағат бұрын

    @@carultch 😪

  • @delta9990
    @delta99906 күн бұрын

    e > π calculus > geometry i will die on this hill

  • @sebas31415

    @sebas31415

    6 күн бұрын

    What about Calc 3 and 4 which touches on geometry (as in proof of area, surface area, and volume formulae)

  • @danmiltenberger5616

    @danmiltenberger5616

    6 күн бұрын

    2.718 is not > than 3.14.........

  • @unicorn3232

    @unicorn3232

    6 күн бұрын

    @@sebas31415 that is barely geometry tbh, and that's actually fun

  • @Cow.cool.

    @Cow.cool.

    5 күн бұрын

    Abstract linear algebra > calculus any day

  • @hydropage2855

    @hydropage2855

    5 күн бұрын

    @@sebas31415I’ve definitely seen you before somewhere else. Another gd player

  • @fractodacto
    @fractodacto5 күн бұрын

    cool

  • @ElGnomistico
    @ElGnomisticoКүн бұрын

    *E*

  • @assassinraider442
    @assassinraider4425 күн бұрын

    e

  • @carultch

    @carultch

    3 сағат бұрын

    Integral z^2 dz From 1 to the cube root of 3 Times the cosine Of 3 pi over 9 Is the log of the cube root of e

  • @rikisanity6045
    @rikisanity60455 күн бұрын

    Engineers: e=pi=3

  • @gaigor
    @gaigor5 күн бұрын

  • @RobertoCarlos-tn1iq
    @RobertoCarlos-tn1iq3 күн бұрын

    a medical doctor and a mathematician! congrats!

  • @willie333b
    @willie333b4 күн бұрын

    👀

  • @Fire_Axus
    @Fire_Axus4 күн бұрын

    why sponsor this video?

  • @JJW410

    @JJW410

    3 күн бұрын

    So he can earn money?

  • @Lolwutdesu9000
    @Lolwutdesu90005 күн бұрын

    Nice video but at 5:40 you skipped why the limit simply equals 1. You can't just wave your hands and make it so as the limit tends to 0/0.

  • @joelganesh8920

    @joelganesh8920

    5 күн бұрын

    As stated in the video, the limit is the definition of the derivative of e^x at x=0, which was already assumed to be 1.

  • @S-payanage
    @S-payanage6 күн бұрын

    Otters 🦦