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

Euler's Number, e, is one of the most prominent constants in mathematics and exponential functions are some of the most important in maths. In this video: we take a deep dive into what Euler's Number is, what exponential functions are and how to differentiate them and we take a look at the super important natural logarithm, ln(x).
Website: mathacy.com
Timestamps:
0:00 - Intro
0:27 - Compound interest
2:37 - Defining e (Euler's Number)
3:30 - Differentiating exponential functions
6:10 - Derivative of e^x
6:48 - The Natural Logarithm - ln(x)
8:22 - Derivative of ln(x)

Пікірлер: 275

  • @angrwl
    @angrwl3 жыл бұрын

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

  • @samueljehanno

    @samueljehanno

    Жыл бұрын

    Good

  • @vortex6132

    @vortex6132

    9 ай бұрын

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

  • @Premium55

    @Premium55

    8 ай бұрын

    ​@@vortex6132any good videos?

  • @abbasfadhil1715

    @abbasfadhil1715

    5 ай бұрын

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

  • @nimo517

    @nimo517

    4 ай бұрын

    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-reload92323 ай бұрын

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

  • @manavgupta2059

    @manavgupta2059

    2 ай бұрын

    Fr!

  • @user-dy9nv4os4q
    @user-dy9nv4os4q2 ай бұрын

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

  • @kennethchao1290
    @kennethchao12904 ай бұрын

    anyone still confused here?

  • @user-ef9zk6np2e

    @user-ef9zk6np2e

    2 ай бұрын

    Yeah me😅

  • @manavgupta2059

    @manavgupta2059

    2 ай бұрын

    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 :)

  • @user-ef9zk6np2e

    @user-ef9zk6np2e

    2 ай бұрын

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

  • @saravananrajendran9813

    @saravananrajendran9813

    Ай бұрын

    Me too

  • @notreallydavid

    @notreallydavid

    26 күн бұрын

    Always!

  • @finleycooper8844
    @finleycooper8844 Жыл бұрын

    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

    4 ай бұрын

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

  • @69erthx1138

    @69erthx1138

    4 ай бұрын

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

  • @ChatGPTGamingReal

    @ChatGPTGamingReal

    3 ай бұрын

    @@69erthx1138oily macaroni

  • @karimjanmohamed3835
    @karimjanmohamed38353 жыл бұрын

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

  • @newsgo1876
    @newsgo18769 ай бұрын

    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

    7 ай бұрын

    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

    7 ай бұрын

    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

    7 ай бұрын

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

  • @dipteshrai5979

    @dipteshrai5979

    7 ай бұрын

    @@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

    7 ай бұрын

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

  • @LEKSANDER01
    @LEKSANDER017 ай бұрын

    I am in Pre-Calculus and have failed the class twice already, but this third time I am dedicated to passing... not only passing but understanding everything well, like you said, inside and out. I struggled with logs, exponentials, ln/e, but it's no longer petrifying. Such good animations too!

  • @staticion598

    @staticion598

    7 ай бұрын

    💀

  • @ethinesvedi7246

    @ethinesvedi7246

    7 ай бұрын

    Well then buddy , best regards, understand the concept dont rush to obtain marks ,best of luck

  • @dxrkrcs

    @dxrkrcs

    7 ай бұрын

    then just you wait till you get to actual calculus :skull:

  • @LEKSANDER01

    @LEKSANDER01

    6 ай бұрын

    @@dxrkrcs I'll do well, I failed twice because I was severely lacking in basic algebra... it is pretty funny lol

  • @make-a-wish2224

    @make-a-wish2224

    6 ай бұрын

    you hell💀

  • @emmanuelonah4596
    @emmanuelonah45964 ай бұрын

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

  • @Nacerwork
    @Nacerwork2 ай бұрын

    Finally a clean video Thanks!

  • @shyyongc.9477
    @shyyongc.9477 Жыл бұрын

    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

    7 ай бұрын

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

  • @aleenavirdee5656
    @aleenavirdee56563 жыл бұрын

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

  • @jamesbentonticer4706
    @jamesbentonticer4706 Жыл бұрын

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

  • @jesca4855
    @jesca48553 ай бұрын

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

  • @indisingh2990
    @indisingh29903 жыл бұрын

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

  • @0x90meansnop8
    @0x90meansnop82 жыл бұрын

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

  • @joelwyatt9949
    @joelwyatt99492 жыл бұрын

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

  • @sathyanarayananviswanathan3770
    @sathyanarayananviswanathan3770 Жыл бұрын

    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

    2 ай бұрын

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

  • @aaronnanoo1887
    @aaronnanoo18873 жыл бұрын

    Brilliant video, cleared all my doubts 👍

  • @JASPREETKAUR-eo9oe
    @JASPREETKAUR-eo9oe3 жыл бұрын

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

  • @Jee2024IIT
    @Jee2024IIT Жыл бұрын

    So much potential in this channel as the way he teaches

  • @nagarjun385
    @nagarjun3855 ай бұрын

    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!!

  • @DiLLZGFX
    @DiLLZGFX3 жыл бұрын

    Great video ! Learnt a lot and beautifully explained !

  • @rickintexas1584
    @rickintexas1584 Жыл бұрын

    I wish I had KZread when I was in college. I graduated with a BS Aeronautical Engineering in 1986.

  • @henrynwosu6277
    @henrynwosu627710 ай бұрын

    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

  • @forpublicstuff728
    @forpublicstuff7282 жыл бұрын

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

  • @davindersehmi33
    @davindersehmi333 жыл бұрын

    This video was great! Very informative!

  • @krishshah2209
    @krishshah22093 жыл бұрын

    Another Masterclass as always! Thank You!

  • @morgangrenoilleau7430
    @morgangrenoilleau743011 күн бұрын

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

  • @amrishravidas9258
    @amrishravidas92583 жыл бұрын

    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 жыл бұрын

    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.

  • @Dinesh123lol
    @Dinesh123lol3 жыл бұрын

    Amazing video, it helped me so much!

  • @block7059
    @block7059 Жыл бұрын

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

  • @amirjutt0
    @amirjutt0 Жыл бұрын

    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 KZreadrs.

  • @jayan99
    @jayan99 Жыл бұрын

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

  • @ranjithamarakoon8842
    @ranjithamarakoon8842 Жыл бұрын

    Excellent explanations. Thank you very much.

  • @kayihanthescientist6881
    @kayihanthescientist68812 жыл бұрын

    Really nice video. Thanks for your explanations.

  • @exoticcoder5365
    @exoticcoder53658 ай бұрын

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

  • @dilipranade
    @dilipranade Жыл бұрын

    simply a wonderful explanation got it first time

  • @nithinsikinam
    @nithinsikinam2 жыл бұрын

    heavily underated channel

  • @Av-fn5wx
    @Av-fn5wx11 ай бұрын

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

  • @nassimzouaoui469
    @nassimzouaoui469 Жыл бұрын

    mind blowing mathematics

  • @elhatimimohammad6944
    @elhatimimohammad69444 ай бұрын

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

  • @chackken
    @chackken2 жыл бұрын

    Nice one, great job!

  • @anupamyadav5038
    @anupamyadav50387 ай бұрын

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

  • @ARS-fi5dp
    @ARS-fi5dp Жыл бұрын

    Thank you for the useful content 🙏

  • @keftam
    @keftam6 ай бұрын

    A fantastic explantion of the relationships.

  • @er-s428
    @er-s428Ай бұрын

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

  • @car103d
    @car103d Жыл бұрын

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

  • @iamtrevor1551
    @iamtrevor15513 жыл бұрын

    Please start making more like this

  • @jononeill5684
    @jononeill56842 жыл бұрын

    great video - thank you

  • @saltstillwaters7506
    @saltstillwaters75063 жыл бұрын

    Thank you very much you're very skilled

  • @liaoweien
    @liaoweien6 күн бұрын

    this is so amazing. thanks a lot

  • @0Christ1
    @0Christ12 жыл бұрын

    Thanks for all your expressions

  • @jsingh6931
    @jsingh69313 жыл бұрын

    Really good video 👍

  • @VolkGreg
    @VolkGreg2 жыл бұрын

    Very well done

  • @vytg706
    @vytg7062 жыл бұрын

    what a great channel!

  • @nikkibhamra7536
    @nikkibhamra75363 жыл бұрын

    Really well explained I enjoyed this video

  • @msag68

    @msag68

    4 ай бұрын

    🤓

  • @genesis553
    @genesis5533 жыл бұрын

    Wooow mindblowing😍😍

  • @vidyadharkottisa8367
    @vidyadharkottisa836711 ай бұрын

    Too good. Excellent. Thanks

  • @Eds0n2021Gamer
    @Eds0n2021Gamer Жыл бұрын

    great video man!

  • @miguelrosales581
    @miguelrosales581 Жыл бұрын

    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🎉🎉🎉

  • @user-bt8ru5fr6u
    @user-bt8ru5fr6u9 ай бұрын

    My god what an excellent video!!

  • @neiloppa2620
    @neiloppa26202 жыл бұрын

    Great video!

  • @mosab643
    @mosab643 Жыл бұрын

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

  • @lemonmorning4204
    @lemonmorning42046 ай бұрын

    Wow, just wow. Its beautiful.

  • @Mahdi.alkawaz
    @Mahdi.alkawaz6 ай бұрын

    Thank you very much amazing content

  • @Jadem4
    @Jadem4Ай бұрын

    Nice Video!

  • @MohamedAhmed-gh6cs
    @MohamedAhmed-gh6cs2 жыл бұрын

    Thank you very much.

  • @LepusCompositions
    @LepusCompositions5 ай бұрын

    amazing video!

  • @josephhuelbig
    @josephhuelbig3 ай бұрын

    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.

  • @dylanalexander5163
    @dylanalexander51632 жыл бұрын

    what an amazing video

  • @algorithminc.8850
    @algorithminc.8850 Жыл бұрын

    Fun channel. Thanks. Subscribed. Cheers

  • @joerob5917
    @joerob591711 ай бұрын

    This is beautiful

  • @nicholas6094
    @nicholas6094 Жыл бұрын

    Amazing video

  • @sukhibhamra5750
    @sukhibhamra57503 жыл бұрын

    Really👌🏻 clever 👏🏻👏🏻

  • @ayokaniolubanjo344
    @ayokaniolubanjo34412 күн бұрын

    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)

  • @nikkibhamra7536
    @nikkibhamra75363 жыл бұрын

    Brilliant 👍🏼

  • @kaholeung9443
    @kaholeung94436 ай бұрын

    Thank your for your tutition

  • @matematicacommarcospaulo
    @matematicacommarcospaulo Жыл бұрын

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

  • @WarzoneMasters
    @WarzoneMasters Жыл бұрын

    amazing thanks !!

  • @Sara-gw5hv
    @Sara-gw5hv Жыл бұрын

    Thank you please make more

  • @kailashsingh9737
    @kailashsingh97377 ай бұрын

    Very nice sir

  • @mohitgehlot6582
    @mohitgehlot65829 ай бұрын

    Thank you so much

  • @Oscar-vd4cv
    @Oscar-vd4cv Жыл бұрын

    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

    Жыл бұрын

    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

    7 ай бұрын

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

  • @kristianmorris9738
    @kristianmorris9738 Жыл бұрын

    Excellent.

  • @ArianTheRestless
    @ArianTheRestless2 жыл бұрын

    Very good video

  • @tradernfts1377
    @tradernfts1377 Жыл бұрын

    That was quite useful

  • @ThreeDogKnightAZ
    @ThreeDogKnightAZ4 ай бұрын

    Thanks for the explanation, Squidward!

  • @oscarvirdee7354
    @oscarvirdee73543 жыл бұрын

    Nice Vid

  • @arjun_12
    @arjun_12 Жыл бұрын

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

  • @YorangeJuice
    @YorangeJuice2 жыл бұрын

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

  • @jimsvideos7201
    @jimsvideos72014 ай бұрын

    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.

  • @rektspresso7288
    @rektspresso72885 ай бұрын

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

  • @comcilliak
    @comcilliak Жыл бұрын

    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

    7 ай бұрын

    It's just 2 ways of saying it

  • @yassinenajar4369
    @yassinenajar4369 Жыл бұрын

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

  • @nandakumarcheiro
    @nandakumarcheiro3 жыл бұрын

    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.

  • @Zackarius
    @Zackarius2 жыл бұрын

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

  • @neerajrameshshiledar8131
    @neerajrameshshiledar81316 ай бұрын

    Amazing

  • @enzoys
    @enzoys6 ай бұрын

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

  • @mecoderstudios7607
    @mecoderstudios7607 Жыл бұрын

    the lore got me good =D