Тёмный

Alternating Geometric Series Sum 

Подписаться
Просмотров 99 тыс.
% 6 707

This is a short, animated visual proof demonstrating the infinite alternating geometric series formula for any positive ratio r with r less than 1 and with positive first term a. This series is important for many results in calculus, discrete mathematics, and combinatorics.
To buy me a coffee, head over to www.buymeacoffee.com/VisualProofs
Thanks!
For a slower, wide format version of this video (without words), see ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-Qa0bOHYjnW0.html
Also, check out my playlist on geometric sums/series: ru-vid.com/group/PLZh9gzIvXQUsgw8W5TUVDtF0q4jEJ3iaw
This animation is based on a proof by The Viewpoints 2000 group from the October 2001 issue of Mathematics Magazine page 320 (www.jstor.org/stable/2691106 ).
#mathshorts​ #mathvideo​ #math​ #calculus #mtbos​ #manim​ #animation​ #theorem​ #pww​ #proofwithoutwords​ #visualproof​ #proof​ #iteachmath #geometricsums #series #infinitesums #infiniteseries #geometric #geometricseries
To learn more about animating with manim, check out:
manim.community

Опубликовано:

 

13 июн 2024

Поделиться:

Ссылка:

Скачать:

Готовим ссылку...

Добавить в:

Мой плейлист
Посмотреть позже
Комментарии : 81   
@circle-of-5ths
@circle-of-5ths 4 месяца назад
When people say "math is beautiful," things like this are what they mean.
@gabrielbarrantes6946
@gabrielbarrantes6946 4 месяца назад
Exactly!
@adventurousclash6323
@adventurousclash6323 4 месяца назад
Nope. Not always.
@soupisfornoobs4081
@soupisfornoobs4081 4 месяца назад
Depends on who you mean when you say "people". A lot of mathematicians would disagree with you
@BushidoMauve
@BushidoMauve 4 месяца назад
What about "ugly math". I wanna see some abominations.
@rajkotalovic9784
@rajkotalovic9784 3 месяца назад
Ja se ne slazem, ja je uopste ne razumem!
@HermesAngel
@HermesAngel 3 месяца назад
I'll be really honest. I have no idea what you're talking about, but I like listening to you talk about it
@raymitchell9736
@raymitchell9736 4 месяца назад
The isosceles triangle is so underrated LOL
@DanielPoupko
@DanielPoupko 4 месяца назад
That was your best one yet. Brilliant.
@Kiran_Nath
@Kiran_Nath 2 месяца назад
This is really beautiful to watch... beholden to such a sight.
@jedsonguedes
@jedsonguedes 4 месяца назад
Probably the best visual proof of this channel so far!
@virushk
@virushk 4 месяца назад
You sir are a genius, this explanation was a masterclass
@gusthomas6872
@gusthomas6872 4 месяца назад
this is an awesome proof
@grooveseeker6269
@grooveseeker6269 3 месяца назад
This left me with mouth wide open
@sebastianhollmann9611
@sebastianhollmann9611 4 месяца назад
Great work!
@andrewkarsten5268
@andrewkarsten5268 3 месяца назад
My analysis book had a picture of this for the cover
@AK-kz8pe
@AK-kz8pe 2 месяца назад
Beautiful.
@AK-kz8pe
@AK-kz8pe 2 месяца назад
I am subscribing for this
@MathVisualProofs
@MathVisualProofs 2 месяца назад
Thanks!
@31.DiepAnhTuan-bx4cg
@31.DiepAnhTuan-bx4cg 3 месяца назад
Good good thanks for the information brother
@JasonAStillman
@JasonAStillman 4 месяца назад
so nice
@MrBrelphox
@MrBrelphox 4 месяца назад
That's wild
@jamium
@jamium 4 месяца назад
Does this correspond to r being a negative number? This is a beautiful animation, is it manim
@MathVisualProofs
@MathVisualProofs 4 месяца назад
Yes. Manim. This is a geometric series with negative ratio. Or you can make r positive and alternate as I have here.
@vennstudios9885
@vennstudios9885 3 месяца назад
Basically Summation to infinity n=0 of A×(-r)^n § is stand in for summation because no symbol in keypad :( Or just Aק-r^n
@ribozyme2899
@ribozyme2899 Месяц назад
If you're on Windows, you can type Windows key + . to open a menu from which you can type math symbols and Greek letters
@Gabriel_Bento
@Gabriel_Bento 4 месяца назад
Are those animations made in Python (Manim)?
@MathVisualProofs
@MathVisualProofs 4 месяца назад
Yes. Made with manim
@adamshenk9970
@adamshenk9970 3 месяца назад
Sweet
@RSLT
@RSLT 2 месяца назад
@ezrad5273
@ezrad5273 3 месяца назад
this is so useful in my daily life.
@randomproductionscj587
@randomproductionscj587 4 месяца назад
My first thought was - who tf uses y=-rx+a rther than y=-mx+c
@mosescheung5794
@mosescheung5794 4 месяца назад
i can't see why the distance between the purple line with length ar and the line y=-rx+a is ar^2, can anyone help
@MathVisualProofs
@MathVisualProofs 4 месяца назад
This takes some work. You first want to use the previous information to find the x-coordinate of that line, which is a-ar (because it is obtained by first traveling distance a and then back ar. Now when you plug x=a-ar into the two lines you get -r(a-ar)+a and a-ar. When you subtract these you get (-ar+ar^2+a) - (a-ar), which is ar^2. Same type of thing goes for the next vertical line and so on.
@carlosaguilarbogantes667
@carlosaguilarbogantes667 4 месяца назад
Wow!
@Humon66
@Humon66 3 месяца назад
Looks like it forms a hallway 😮
@ZzSlumberzZ
@ZzSlumberzZ 4 месяца назад
HOW DO YOU FIGURE ALL THAT OUT
@MathVisualProofs
@MathVisualProofs 4 месяца назад
All proofs have citations in the description :)
@ZzSlumberzZ
@ZzSlumberzZ 4 месяца назад
@@MathVisualProofs now that's pretty cool
@dan-us6nk
@dan-us6nk 4 месяца назад
People get paid to do this. Cool job!
@BernardGreenberg
@BernardGreenberg 4 месяца назад
As pirates are wont to say, "Arrrrr!"
@charliezard64
@charliezard64 4 месяца назад
Wowzers
@reedmiller1055
@reedmiller1055 4 месяца назад
The piece I’m unclear about is why we can be sure it’s an isosceles triangle if the absolute value of the slopes of the lines ( +1 and
@MathVisualProofs
@MathVisualProofs 4 месяца назад
The line of interest is y=x. If you draw from any point on y=x and draw a vertical distance z, then a horizontal distance of z will put you back at y=c (because you changed the c and y coordinates both by z)
@EbenCT_
@EbenCT_ 4 месяца назад
Chat is this real?
@flaviusmuntean6391
@flaviusmuntean6391 4 месяца назад
nah bro u accidentaly took some funny mushrooms this morning :(
@NitronBeam
@NitronBeam 4 месяца назад
Yes it is, I was the convergence point
@tylosenpai6920
@tylosenpai6920 4 месяца назад
Yes, under the condition that -1
@LumaSloth
@LumaSloth 3 месяца назад
​@NitronBeam can I have an autograph?
@NitronBeam
@NitronBeam 3 месяца назад
@@LumaSloth Yeah sure, wait a... Oh ... , I forgot points don't even have arms to sign one :(
@user-zh9tc9cf1d
@user-zh9tc9cf1d 4 месяца назад
how do you come up with these proofs
@MathVisualProofs
@MathVisualProofs 4 месяца назад
All the videos have citations in the description to the original published static diagrams. I don’t come up with them, I just animate them so they can get wider exposure.
@marvinjno-baptiste726
@marvinjno-baptiste726 3 месяца назад
what's this useful for?
@NilAmbition
@NilAmbition 3 месяца назад
Why didn’t you divide them by a 😔
@Davide-gk9sz
@Davide-gk9sz 4 месяца назад
Can you do a visual of talet theorem?
@pizza8725
@pizza8725 3 месяца назад
Substituit u=-r and you will get a+au+au²+....=a÷(1-u)
@rahulsai2093
@rahulsai2093 4 месяца назад
How bro how you imagine all this stuff 😮😂😂
@MathVisualProofs
@MathVisualProofs 4 месяца назад
not all me. I provide citations for each visual proof in the descriptions.
@Sara-ns3lq
@Sara-ns3lq 4 месяца назад
​@MathVisualProofs who helps u with such beautiful ideas?
@MathVisualProofs
@MathVisualProofs 4 месяца назад
@@Sara-ns3lq As mentioned, I just use the citations given (which are typically static diagrams) and then animate them in a way that I want to see them unfold. I don't have any help producing the animations or videos.
@Sara-ns3lq
@Sara-ns3lq 4 месяца назад
​@MathVisualProofs Can u recommend any books which has such visual proofs
@MathVisualProofs
@MathVisualProofs 4 месяца назад
@@Sara-ns3lq Check out any of the books by Roger B. Nelsen (he has a lot). At some point I had thought about doing a video about the books I use... maybe that's a good idea... :)
@RenneVangr
@RenneVangr 2 месяца назад
I understand it, but it still messes with my brain
@misterscollard
@misterscollard 3 месяца назад
Curves??
@milesfreilich968
@milesfreilich968 3 месяца назад
No, it would be (a/1+r)/2 since the final result you showed was half
@sbrinkley1022
@sbrinkley1022 2 месяца назад
0.5
@jasonc7593
@jasonc7593 4 месяца назад
All i know is a and r are lines at an x coordinate so yeah im smart
@the.lemon.linguist
@the.lemon.linguist 3 месяца назад
the fazbear sum
@orpheuscreativeco9236
@orpheuscreativeco9236 3 месяца назад
Sort of like a lerp function 🤔
@martingibbs8972
@martingibbs8972 4 месяца назад
*ratio of -r
@jrhermosura4600
@jrhermosura4600 3 месяца назад
ok
@jilldlc4423
@jilldlc4423 4 месяца назад
Huh?
@haipingcao2212_.
@haipingcao2212_. 3 месяца назад
💀
@jebtickle4065
@jebtickle4065 4 месяца назад
you lost me when you started using the alphabet
@NoSuchStrings
@NoSuchStrings 4 месяца назад
Ok wtf
@IronicHavoc
@IronicHavoc 4 месяца назад
Bruh
@Fire_Axus
@Fire_Axus 14 дней назад
too confusing