What is e and ln(x)? (Euler's Number and The Natural Logarithm)

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  • Опубліковано 21 лис 2024

КОМЕНТАРІ • 330

  • @angrwl
    @angrwl 3 роки тому +819

    Spent hours trying to understand what is eulers constant and got it straightaway by looking at this. Thanks a lot.

    • @samueljehanno
      @samueljehanno Рік тому

      Good

    • @vortex6132
      @vortex6132 Рік тому +1

      That’s great but in terms of its properties I’d go much further

    • @Premium55
      @Premium55 Рік тому

      ​@@vortex6132any good videos?

    • @abbasfadhil1715
      @abbasfadhil1715 10 місяців тому

      I rly understood every
      thing in this vid but the factorisation of p

    • @nimo517
      @nimo517 9 місяців тому +2

      I’m looking for one of those in regard to quantum theory and the applications in real world. I understand so far _it’s used on a micro scale when viewing the world, and small objects like atoms, and how the fundamental laws in nature do not apply any longer at the quantum level._ and I understand that concept, but that’s where I’m left in terms of my true understanding and faith in quantum theory. After describing the basic desires and principles of the study, I don’t really understand how the study is supposed to translate to real life. Then the thought experiments like the *cat in a box*? I sometimes think it’s just mental master***tion and all hypothetical talk. Sure I believe it’s provable on paper but to me I’m sooo close to getting it, but until then it’s like being a kid trying to pray and not knowing what to do

  • @sw-reload9232
    @sw-reload9232 9 місяців тому +147

    The explanation feels like getting an eureka moment every 5 seconds or so. Realizing all the connection you've learned in math

  • @AimerBoy-t2z
    @AimerBoy-t2z 7 місяців тому +13

    I WAS VERY HELPLESS ON UA-cam TO FIND OUT A RIGHT VIDEO TO LEARN THESE LESSONS. THEN THIS ONE CAME. THANKS A LOT. LOVE FROM INDIA

  • @finleycooper8844
    @finleycooper8844 Рік тому +286

    Just a heads up 'e' is Euler's number. Euler's Constant is a different constant (Also called the Euler-Mascheroni constant sometimes) and is denoted by a lowercase gamma

    • @JunioSonicT.Hedgehog
      @JunioSonicT.Hedgehog 10 місяців тому +4

      and it is a part of the connection inbetween the Harmonic numbers and Factorials, so that's neat.

    • @69erthx1138
      @69erthx1138 9 місяців тому +5

      Euler number, Napier constant is e. Oily-Macroni constant is gamma.

    • @LukieReal
      @LukieReal 8 місяців тому

      @@69erthx1138oily macaroni

  • @newsgo1876
    @newsgo1876 Рік тому +83

    It is worth emphasizing that "e" is a number defined through the limit operation. And it happens to show an unique property in another limit operation, i.e. the derivative, that e^x has itself as its derivative. This is one of the wonders associated with the limit operation and the infinity process. Essentially, a number is just a symbolic name for a bunch of operations, except the symbols for the natural number 0~9.

    • @leslyvalerianavarroberrone9323
      @leslyvalerianavarroberrone9323 Рік тому

      But what does it mean its derivative it's the same as the original function? As I knows, the derivative shows the growth rhythm for that function. Does it mean that the growth of f(x)=e^x is constant?

    • @dipteshrai5979
      @dipteshrai5979 Рік тому

      But 2 is an operation of 1+1 and 0 is 1-1. Is it not? And 1/ 2 is 1 divided by 1 + 1

    • @newsgo1876
      @newsgo1876 Рік тому

      ​@@dipteshrai5979 Profound! So it seems there's nothing fundamental beyond the number 0 and 1. Does this imply the binary representation?

    • @dipteshrai5979
      @dipteshrai5979 Рік тому +2

      @@newsgo1876 well, I said that 0 is 1-1. So I’m saying, only 1 exists. Unless u want to think of 0 as an absence of 1, or an absence of anything.

    • @newsgo1876
      @newsgo1876 Рік тому

      @@dipteshrai5979 Yes, your idea is very impressive! I agree with you.

  • @emmanuelonah4596
    @emmanuelonah4596 9 місяців тому +7

    Wow! You virtually connected various aspects of mathematics in a very interesting way! Thank you!

  • @karimjanmohamed3835
    @karimjanmohamed3835 3 роки тому +94

    Doesn’t get better than this when it comes to explanation. Thanks!

  • @rickintexas1584
    @rickintexas1584 Рік тому +7

    I wish I had UA-cam when I was in college. I graduated with a BS Aeronautical Engineering in 1986.

  • @Lordversus44
    @Lordversus44 5 днів тому

    This video is incredible. It is well explained and clear. Never seen so much professionalism and precision in a video like this. Thank you!! 🎉

  • @nacerwork
    @nacerwork 8 місяців тому +2

    Finally a clean video Thanks!

  • @nagarjun385
    @nagarjun385 10 місяців тому

    Damn!!! These many years as a STEM Student, I've never ever got the finest and the most intuitive explaination of Euler's Number.
    Great video Mathacy. Good Luck!!

  • @kennethchao1290
    @kennethchao1290 10 місяців тому +206

    anyone still confused here?

    • @Aakash-e1x4t
      @Aakash-e1x4t 8 місяців тому +7

      Yeah me😅

    • @manavgupta2059
      @manavgupta2059 7 місяців тому +28

      Where did u got confused?
      I legit took 3 hours understanding this whole concept from this video and ran into lot of misconceptions
      So, I recommend u the following before watching the video:
      1) Be expert with all logarithmic properties. (Solve 10 questions of each to master them)
      2) Be expert with all exponential properties
      3) Most importantly, learn differentiation first
      Then u will get second half of the video
      It is very complicated but once u understand it, it becomes very very simple :)

    • @Aakash-e1x4t
      @Aakash-e1x4t 7 місяців тому

      @@manavgupta2059 no need now! I have understood it well

    • @saravananrajendran9813
      @saravananrajendran9813 7 місяців тому

      Me too

    • @notreallydavid
      @notreallydavid 6 місяців тому

      Always!

  • @shyyongc.9477
    @shyyongc.9477 Рік тому +25

    Very well explained video! Made the "e" great again, and really this should be taught in colleges/unis to get students understand the intuition behind

    • @leslyvalerianavarroberrone9323
      @leslyvalerianavarroberrone9323 Рік тому +2

      Yes, most students never know where does this stuff comes from, as " but that way they can't see the beauty in it.

  • @jamesbentonticer4706
    @jamesbentonticer4706 2 роки тому +17

    This is great. I never understood where the decay function y=e^-×ln (2) actually came from! Fantastic thanks.

  • @joelwyatt9949
    @joelwyatt9949 2 роки тому +7

    Amazing video, you managed to perfectly explain e and ln in 12 minutes.

  • @JASPREETKAUR-eo9oe
    @JASPREETKAUR-eo9oe 3 роки тому +33

    I’ve had problem with this concept.But after watching this, all my doubts are cleared now. Thanks a ton.

  • @elhatimimohammad6944
    @elhatimimohammad6944 10 місяців тому

    I'am a senior in high school and this helped me so much when working with these functions in math and physics

  • @sathyanarayananviswanathan3770

    I bet this is the best video about mathematics on youtube. I didnt even skip a single second, I enjoyed it entirely.... You just earned a new subscriber.

    • @manavgupta2059
      @manavgupta2059 7 місяців тому +1

      It is not the best in any way lol
      3blue1brown is best
      Now what are u giving me because u lost the bet?😊

  • @mihisarakaveesha8954
    @mihisarakaveesha8954 26 днів тому

    The best explanation for 'e' I've seen. Superb Work 😊

  • @forpublicstuff728
    @forpublicstuff728 2 роки тому +2

    Brilliant explanation! Thank you. It clicked when you said that we want 1 as a constant.

  • @henrynwosu6277
    @henrynwosu6277 Рік тому +6

    Omo. I hope I get to meet this man someday and thank him personally. Because you're out there giving meaning to my engineering degree and helping me see these things intuitively. Allowing me to chase my passion for Mathematics. Thank you isn't enough. Hopefully I can do something for you too.
    Thanks @Mathacy

  • @Jee2024IIT
    @Jee2024IIT 2 роки тому +4

    So much potential in this channel as the way he teaches

  • @block7059
    @block7059 Рік тому

    Writing a test in a week about this topic, very nicely summarized

  • @car103d
    @car103d Рік тому +2

    I am approaching an e^exponential headache, but it’s very interesting, thanks!

  • @aaronnanoo1887
    @aaronnanoo1887 3 роки тому +17

    Brilliant video, cleared all my doubts 👍

  • @RM-yv7zv
    @RM-yv7zv 4 місяці тому

    I Just want you Let you know That I studied this for years back in high school and this is the first video made me understand what it means

  • @boshraal-sheghri7821
    @boshraal-sheghri7821 3 місяці тому

    wow.. very well- constructed video.. I like it when people start explaining from origins.. Thank you

  • @nithinsikinam
    @nithinsikinam 2 роки тому +1

    heavily underated channel

  • @jesca4855
    @jesca4855 8 місяців тому +1

    this was so insightful, love all the connections you made, really helped me put it all together.

  • @0x90meansnop8
    @0x90meansnop8 2 роки тому +1

    Mathacy, thank you so much. I ve been diggin from explanation to explanation without getting it.

  • @ayokaniolubanjo344
    @ayokaniolubanjo344 5 місяців тому +1

    this was very very helpful
    was a bit too fast though as i had to keep processing so many things just said while listening to what is being said after
    it really rests on your previous understanding (strong understanding) of previous topics)

  • @amrishravidas9258
    @amrishravidas9258 3 роки тому +63

    This video was super informative and it goes along great with 3Blue1Brown's video on Euler number. Also, at 6:26 the graph for x^100 looks a little off, isn't it supposed to be much steeper?

    • @Mathacy
      @Mathacy  3 роки тому +40

      Thank you for the kind words Amrish. As to the graph of x^100 and e^x, if x>648 then e^x > x^100. The main point of of that part is to show how dominant exponential functions are, so you can think of the x-axis scale as being very large.

  • @Av-fn5wx
    @Av-fn5wx Рік тому

    This channel deserves subs at the rate of e^x!!

  • @mangeshjirapure9154
    @mangeshjirapure9154 16 днів тому

    What a easy explanation 👍

  • @aleenavirdee5656
    @aleenavirdee5656 3 роки тому +12

    I love your videos! Excellent explanations - they never made this clear in school! Thank you so much!

  • @amirjutt0
    @amirjutt0 2 роки тому +4

    Boy you make incredibly awesome videos😻 Awsome explanation.I suggest you to be active on this channel and gradually you'll be listed in top class UA-camrs.

  • @indisingh2990
    @indisingh2990 3 роки тому +6

    Thank you Mathacy !!
    You explained this really well 👍🏼

  • @keftam
    @keftam 11 місяців тому

    A fantastic explantion of the relationships.

  • @morgangrenoilleau7430
    @morgangrenoilleau7430 5 місяців тому

    From France, that was verry interesting, nice job !!

  • @nassimzouaoui469
    @nassimzouaoui469 Рік тому +1

    mind blowing mathematics

  • @sharibkausar-n8t
    @sharibkausar-n8t 3 місяці тому

    I am from India i want to say that your video based on interesting facts

  • @fetch7312
    @fetch7312 Рік тому

    proving the limit as n approaches infinity of (1+1/n)^n is such a fun excersize tbh, recommend it to anyone who wishes to try it

    • @fetch7312
      @fetch7312 Рік тому

      Also the proof of the derivative of ln(x) is incredible

  • @iamtrevor1551
    @iamtrevor1551 3 роки тому +1

    Please start making more like this

  • @arjun_12
    @arjun_12 Рік тому +1

    U thought us calculus in the simplest way possible than any schools or coaching institutes did.

  • @exoticcoder5365
    @exoticcoder5365 Рік тому

    this video is very useful, very very good, I hope it gains more recognitions

  • @josephhuelbig
    @josephhuelbig 8 місяців тому

    Energy can equate to Mass dissolving multipled by constant multipled by imagery vapor symbol representation squared
    E≠imc
    (-)E=(imc)²
    E≠(imc)²
    (-)E=imc²
    E≠imc²
    (-)E=((i)(mc))²
    E≠((i)(mc))²
    (-)E=mic²
    E≠mic²
    E=(mc/2πr)²
    E≠(imc/2πr)²
    E=mc²
    E=i
    In mathematics and physics, the symbol "c" can represent various concepts and constants, including:
    1. Speed of light: In physics, "c" typically represents the speed of light in vacuum, approximately \(3 \times 10^8\) meters per second.
    2. Constant: "c" can also represent any constant value used in equations, formulas, or expressions.
    3. Circumference: In geometry, "c" often represents the circumference of a circle, given by \(2\pi r\) where \(r\) is the radius.
    4. Center: In geometry or coordinate systems, "c" can denote the center point of a circle or other geometric figure.
    5. Complex number: In complex analysis, "c" is sometimes used as a constant in complex numbers, such as in expressions like \(z = a + bi\), where \(c\) represents the real part of a complex number.
    These are some of the common uses of the symbol "c" in mathematics and physics, though its specific meaning can vary depending on the context.

  • @Mikerdlt
    @Mikerdlt Рік тому

    Thank you a lot i have been watching lot of videos trying to understand better what is e and with your your explanation i got it in no time although im not a native english speaker🎉🎉🎉

  • @dilipranade
    @dilipranade Рік тому

    simply a wonderful explanation got it first time

  • @nandakumarcheiro
    @nandakumarcheiro 3 роки тому +2

    The graph of y=x swings between exponential power of e upto x and by inversion becomes a logarithm of x.By Lambert function this becomes a complex number w multiplied by e to the power w.This means a complex may swing between an exponential by the power w as well may become an inverse function as logarithm of a complex number.

  • @krishshah2209
    @krishshah2209 3 роки тому +17

    Another Masterclass as always! Thank You!

  • @tommypaul501
    @tommypaul501 4 місяці тому +3

    It could have been explained little slowly so that audience gets time to understand and catch up

  • @DiLLZGFX
    @DiLLZGFX 3 роки тому +6

    Great video ! Learnt a lot and beautifully explained !

  • @jayan99
    @jayan99 Рік тому

    Great work, things unravel like magic, amazing and precise. Thanks again. Differentiation of e^x, lnx, a^x . Nice and smooth

  • @jimsvideos7201
    @jimsvideos7201 9 місяців тому

    In the case of radioactive decay the mass isn't lost so dramatically, what changes according to that function is the concentration of that particular radioisotope. They all end up as Pb, some just take more steps to get there.

  • @jayking2011
    @jayking2011 5 місяців тому

    In 8:56 you can't cancel out something unless if its using multiplication. That is using addition so you can;t cancel it out.

  • @User-54321n
    @User-54321n Рік тому

    Hey, you are great teacher, dude. Thanks a ton.

  • @nikkibhamra7536
    @nikkibhamra7536 3 роки тому +2

    Really well explained I enjoyed this video

    • @msag68
      @msag68 9 місяців тому

      🤓

  • @YorangeJuice
    @YorangeJuice 2 роки тому

    5:44 that was cool i've never seen that derivation before

  • @davindersehmi33
    @davindersehmi33 3 роки тому +3

    This video was great! Very informative!

  • @Dinesh123lol
    @Dinesh123lol 3 роки тому +5

    Amazing video, it helped me so much!

  • @mosab643
    @mosab643 Рік тому +1

    What software do you use to make the animations? Or, do you code it all? Btw, great job.

  • @joerob5917
    @joerob5917 Рік тому +1

    This is beautiful

  • @Zackarius
    @Zackarius 3 роки тому +1

    I will worship the exponential function right now, holy shift.

  • @octs609
    @octs609 10 місяців тому +2

    at 8:57 (x+h/X) why would x cancel? it is because the ln of x+h is the same thing x times H and therefore all over x would mean x cancels and thus it becomes 1+h? I am confused someone let me know.

  • @genesis553
    @genesis553 3 роки тому +1

    Wooow mindblowing😍😍

  • @rektspresso7288
    @rektspresso7288 10 місяців тому

    OH MY GOD, this at the beginning of the video is what I was trying to understand. I'm shocked

  • @0Christ1
    @0Christ1 2 роки тому

    Thanks for all your expressions

  • @saltstillwaters7506
    @saltstillwaters7506 3 роки тому +1

    Thank you very much you're very skilled

  • @Oscar-vd4cv
    @Oscar-vd4cv Рік тому +13

    Seems like he uses logarithms to define logarithms. I'm sure this video could be useful, but I'd have to watch it over and over and slow the speed.

    • @davidlixenberg5999
      @davidlixenberg5999 Рік тому +3

      I found the video much too fast and when all the different k's were exchanged for different values along the grraph of e questionable.
      David Lixenberg

    • @SpaceWoods
      @SpaceWoods Рік тому +1

      @@davidlixenberg5999bro really signed off a youtube comment with his name

    • @Sammysapphira
      @Sammysapphira Місяць тому

      ​@@SpaceWoodsIt's an ai

  • @ranjithamarakoon8842
    @ranjithamarakoon8842 Рік тому

    Excellent explanations. Thank you very much.

  • @jsingh6931
    @jsingh6931 3 роки тому +2

    Really good video 👍

  • @comcilliak
    @comcilliak Рік тому +4

    great video, thank you. Coming from numberphiles video of e however, i am a little confused - wouldnt it be eulers number and not eulers constant? Which is supposed to be something slightly different?

    • @Mg_887
      @Mg_887 Рік тому

      It's just 2 ways of saying it

  • @mathcrux407
    @mathcrux407 4 місяці тому

    Hi. Your teaching method is very creative and smarter i want to learn from you. So please guide me how can i learn your methodology which software/applications you use to make that awesome videos

  • @ThreeDogKnightAZ
    @ThreeDogKnightAZ 10 місяців тому

    Thanks for the explanation, Squidward!

  • @captainsk
    @captainsk Рік тому

    We never taughtt the derivatiion of thiis value.
    Thanks.

  • @yassinenajar4369
    @yassinenajar4369 Рік тому +2

    This has the same feeling as discovering lost lore that's filled with plot twists

  • @vytg706
    @vytg706 2 роки тому +1

    what a great channel!

  • @eclipsehorizon7655
    @eclipsehorizon7655 6 місяців тому

    I finally found the answer , i finally knew where logarthims come from

    • @mensamoo
      @mensamoo 5 місяців тому

      a log is an index

  • @kailashsingh9737
    @kailashsingh9737 Рік тому

    Very nice sir

  • @lemonmorning4204
    @lemonmorning4204 Рік тому

    Wow, just wow. Its beautiful.

  • @Humbertofxl
    @Humbertofxl Рік тому

    My god what an excellent video!!

  • @VolkGreg
    @VolkGreg 3 роки тому +1

    Very well done

  • @jononeill5684
    @jononeill5684 3 роки тому +2

    great video - thank you

  • @kayihanthescientist6881
    @kayihanthescientist6881 2 роки тому

    Really nice video. Thanks for your explanations.

  • @timseguine2
    @timseguine2 Рік тому +1

    Getting rid of the limit near 5:51 with that justification isn't actually rigorous. The way you perform the substitution here isn't strictly valid, since you would have to introduce the limit for e with a different limit variable. So you'd have an h1 and an h2. You can swap around some of the limits using continuity arguments. But in order to perform the combination of the two h's into a single limit variable you have to demonstrate uniform convergence to the limit first.
    I realize that an epsilon delta proof (to show uniform convergence) might be a little out of place for this audience, but I am sure there are other ways to show what you were trying to demonstrate that aren't so hand-wavy.

  • @chackken
    @chackken 3 роки тому +1

    Nice one, great job!

  • @nicholas6094
    @nicholas6094 Рік тому

    Amazing video

  • @liaoweien
    @liaoweien 5 місяців тому

    this is so amazing. thanks a lot

  • @matematicacommarcospaulo
    @matematicacommarcospaulo Рік тому

    Excellent video... Could you please give me any hint of how I create animations with LaTeX formulas like you do?

  • @oscarvirdee7354
    @oscarvirdee7354 3 роки тому +4

    Nice Vid

  • @SsvbxxYT
    @SsvbxxYT Рік тому +1

    2:52 Actually, e is called Euler's number. Euler's constant refers to a different number that is approximately 0.577... (denoted by a lowercase gamma, γ).

    • @plaierdifortnaiti9955
      @plaierdifortnaiti9955 Рік тому +2

      I use to call It the Euler- Mascheroni Constant the last one

    • @SsvbxxYT
      @SsvbxxYT Рік тому +1

      @@plaierdifortnaiti9955 The Euler-Mascheroni constant is another name for it. You can call it either name.

    • @plaierdifortnaiti9955
      @plaierdifortnaiti9955 Рік тому +2

      @@SsvbxxYT of course

  • @sukhibhamra5750
    @sukhibhamra5750 3 роки тому +2

    Really👌🏻 clever 👏🏻👏🏻

  • @ARS-fi5dp
    @ARS-fi5dp Рік тому

    Thank you for the useful content 🙏

  • @ArianTheRestless
    @ArianTheRestless 2 роки тому

    Very good video

  • @Unitarian-Astronomer
    @Unitarian-Astronomer Місяць тому +1

    Subscribed!

  • @enzoys
    @enzoys 11 місяців тому +1

    I just don't get how you can conclude at 10:28 the derivative of a^x

  • @Jadem4
    @Jadem4 6 місяців тому

    Nice Video!

  • @er-s428
    @er-s428 6 місяців тому

    This was a great video thank you so much! :D

  • @Eds0n2021Gamer
    @Eds0n2021Gamer Рік тому

    great video man!

  • @dylanalexander5163
    @dylanalexander5163 2 роки тому

    what an amazing video