calculus 2 power series, a detailed introduction (form, radius & interval of convergence)

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  • เผยแพร่เมื่อ 5 ก.พ. 2025

ความคิดเห็น • 133

  • @larswassink2593
    @larswassink2593 3 ปีที่แล้ว +144

    When you learn more from a 30 minute video than you learn from online classes for the entire semester.
    I've already passed calculus 2 but I always enjoy watching BPRP nonetheless. This guy makes math fun 👌👌

  • @omniyambot9876
    @omniyambot9876 3 ปีที่แล้ว +76

    Always be excited seeing a 30 min bprp documentary-like video. I'mma grab some popcorn now.

    • @aashsyed1277
      @aashsyed1277 3 ปีที่แล้ว +2

      What? 11 years ago?????

    • @omniyambot9876
      @omniyambot9876 3 ปีที่แล้ว +5

      @@aashsyed1277 what's the problem? I'm his patron more than a decade ago. That's why

    • @aashsyed1277
      @aashsyed1277 3 ปีที่แล้ว +1

      @@omniyambot9876 ok thanks your name includes 11 years ago

    • @tzonic8655
      @tzonic8655 3 ปีที่แล้ว +2

      Same!!!

    • @aashsyed1277
      @aashsyed1277 3 ปีที่แล้ว +2

      @@tzonic8655 I liked your comment

  • @fatherkeys73
    @fatherkeys73 ปีที่แล้ว +18

    You are such a blessing, my calc 2 final is in two days and you explained this sooo much better than my prof!

  • @srr9281
    @srr9281 หลายเดือนก่อน

    I wish that TH-cam would allow us to like something more than once, there is always so much wisdom in his videos.

  • @mohan153doshi
    @mohan153doshi 2 ปีที่แล้ว +4

    If there is a math teacher like bprp in every college in the world, this world will definitely become a better place to live in and learn something meaningful and also learn it the easy way. BPRP makes math fun and easy to comprehend.

  • @kd1389
    @kd1389 3 ปีที่แล้ว +13

    I have my Calc 2 exam tomorrow and power series have been driving me crazy, this video is literally a blessing 😭

  • @vedangigupte9918
    @vedangigupte9918 3 ปีที่แล้ว +15

    I clicked this video to see how a poke ball can help me learn power series and ended up watching whole video because of brilliant explaination 🤣 thankyou 😄

  • @dayanalucio6366
    @dayanalucio6366 2 หลายเดือนก่อน

    Infinitely many thanks for all your content !!! after watching lots of videos, I can say this is the BEST explanation I've found !!!

  • @newjsdavid1
    @newjsdavid1 ปีที่แล้ว +2

    this is the MOST in depth explanation I’ve found!

  • @siddhantpandey5448
    @siddhantpandey5448 3 ปีที่แล้ว +4

    Dude where were you when I was in my FY of engineering 😭. I really wished that this video was available back then. But it's never too late to learn it in better way.

  • @hypersans6209
    @hypersans6209 3 ปีที่แล้ว +6

    Thanks to you and your videos on infinite series and complex numbers I now understand how to implement DFT and FFT in computers. BPRP, you're up there with 3B1B as one of the greatest math teachers ever

  • @srr9281
    @srr9281 2 ปีที่แล้ว +2

    Thanks!

  • @josephparrish7625
    @josephparrish7625 ปีที่แล้ว +1

    Bprp. That is the best introduction to power series that I have ever heard! Great job!

  • @kiparisov1480
    @kiparisov1480 11 หลายเดือนก่อน +1

    "definitely we love polynomials because we can differentiate them, integrate them"
    me who was skipping all calculus classes whole semester: 😰😰😰

  • @codedaily365
    @codedaily365 3 ปีที่แล้ว +16

    i can see that shin chan hanging there.....so cute and the best teacher for calculus :)
    LOVE FROM INDIA

    • @beastgamer4932
      @beastgamer4932 3 ปีที่แล้ว +1

      The golden giraffe there too.

    • @codedaily365
      @codedaily365 3 ปีที่แล้ว

      @@beastgamer4932 yes 🤣

  • @MathElite
    @MathElite 3 ปีที่แล้ว +13

    A 30 minute video! I'm pleased

    • @aashsyed1277
      @aashsyed1277 3 ปีที่แล้ว +3

      I am too!

    • @beastgamer4932
      @beastgamer4932 3 ปีที่แล้ว +1

      You watch bprp! I saw you from Sybermayh videos.

    • @MathElite
      @MathElite 3 ปีที่แล้ว

      @@beastgamer4932 yeah im his moderator and i got my own channel if you didnt know

  • @nikned27th74
    @nikned27th74 3 ปีที่แล้ว +11

    I would be happy to see you using Laurent series as well

  • @logenninefinger3420
    @logenninefinger3420 3 ปีที่แล้ว +5

    such a good channel. I love that you do things oldschool!

  • @HowViolet
    @HowViolet 2 ปีที่แล้ว +1

    This is Gandalf in his purest form. That beard is my savior.

  • @nutritionbyelsa
    @nutritionbyelsa 9 หลายเดือนก่อน

    attitude is everything - thanks for your good attitude and epic personality, it makes the learnign actually happen and actually happen in an enjoyable maner :) you add a lot of value to my education

  • @tomatrix7525
    @tomatrix7525 3 ปีที่แล้ว +1

    You are such a good teacher bprp, cheers!

  • @henokbrehanu
    @henokbrehanu ปีที่แล้ว +1

    Your method is engaging also entertaining

  • @adhiyanthaprabhujeyashanka2091
    @adhiyanthaprabhujeyashanka2091 ปีที่แล้ว +1

    Ahh sir you are awesome, thanks for mentioning about the radius of convergence, which I haven't come across in my text book

  • @jakedcl
    @jakedcl 2 ปีที่แล้ว +1

    14:40 was a game changer

  • @dalisabe62
    @dalisabe62 2 ปีที่แล้ว +3

    Great motivating introduction = Great teaching skills. Thanks.

  • @francescogristina84
    @francescogristina84 ปีที่แล้ว

    bros the best teacher on youtube

  • @matausekoboto1132
    @matausekoboto1132 8 หลายเดือนก่อน

    "I know, please do not turn off the video" 😂😂😂relax, we trust you😂😂❤

  • @kingbeauregard
    @kingbeauregard 3 ปีที่แล้ว +17

    You know what's weird? Periodic functions and the power series. Like, consider the power series for sin(x). The sine of 0 has the same value as the sine of 2 pi, but the terms in the power series are WAYYYY different. sin(0) just involves terms that all equal zero, but sin(2 pi) has got terms that go as high as 81.6 and as low as -76.7, yet somehow they all cancel out and you end up with zero anyway. It's freaky.

  • @hyunsunggo855
    @hyunsunggo855 3 ปีที่แล้ว +1

    More generally, it's actually about the property of basis. Power series is just a specific case of change of basis. Another case would be the Fourier series/transform which yields consequently, the same useful property of being able to just add the coefficients.

  • @isharauditha4257
    @isharauditha4257 3 ปีที่แล้ว +2

    wow! such a great explanation

  • @everlyspencer8880
    @everlyspencer8880 ปีที่แล้ว

    Beautiful, absolutely beautiful Maclaurin.

  • @richardgoulding9330
    @richardgoulding9330 2 ปีที่แล้ว +1

    Thank you for the fraction to decimal analogy. I understand P.S better now

  • @yaranezar7252
    @yaranezar7252 2 ปีที่แล้ว

    YOU ARE A SAVIOUR!!!!!!!!!!!!!!!!!!

  • @vedants.vispute77
    @vedants.vispute77 3 ปีที่แล้ว

    This video is very interesting... coz i am a small family member of the topics you chose this time

  • @arunroshan4506
    @arunroshan4506 ปีที่แล้ว

    i love this man . Thank you !

  • @GuilhermeHeggendorn
    @GuilhermeHeggendorn 8 หลายเดือนก่อน

    Interesting I am learning this as calculus 4.

  • @enatacademy
    @enatacademy ปีที่แล้ว

    thanks from ethiopia east africa

  • @sushi_1233
    @sushi_1233 3 ปีที่แล้ว

    My man talking about fractions that I understand, then immediately skips to matrices! XD. I'm just joking but thanks for the video! You inspired me to start my own channel and I love all of your content!

  • @ArhamKhan05
    @ArhamKhan05 ปีที่แล้ว

    This is on another level thank you so much sir you explained it in a very amazing way ❤

  • @ThePowerfulOne07
    @ThePowerfulOne07 3 ปีที่แล้ว +3

    Needed you when I took Cal2! Still give me nightmares 😖😖😖

  • @abhinandt2329
    @abhinandt2329 ปีที่แล้ว

    i should say ..."mind-blowing teaching skills"

  • @desertrainfrog1691
    @desertrainfrog1691 2 ปีที่แล้ว +2

    Enjoyment diverges to infinity 🤝

  • @EuniceMusa-y4m
    @EuniceMusa-y4m 3 หลายเดือนก่อน

    Hi 👋 I love love your videos. I have question tho and I kept seem to get an explanation.
    What does it mean for us to center a series at a particular value.
    Like what is the significance of the center of a series

  • @Babe_Chinwendum
    @Babe_Chinwendum 3 หลายเดือนก่อน

    Thank you so much sir

  • @eda1198-w6m
    @eda1198-w6m 2 ปีที่แล้ว +1

    Wow. Amazing. Thank you so much!

  • @EquinoXReZ
    @EquinoXReZ 3 ปีที่แล้ว

    I LOVE THE BEST FRIEND

  • @ASHIR001
    @ASHIR001 3 ปีที่แล้ว +1

    You are doing great at maths, helps a lot. But, Why do you have Beard?

  • @kirst6846
    @kirst6846 11 หลายเดือนก่อน

    What operation did you perform at 5:00 to arrive to the new forms of e to the x and 1 over 1 - x?

  • @Engineering_conceptsUOM
    @Engineering_conceptsUOM 3 ปีที่แล้ว +1

    Thank you professor

  • @YoungPhysicistsClub1729
    @YoungPhysicistsClub1729 9 หลายเดือนก่อน

    oh nah blackpenredpen linear algebra jumpscare!!!!! bro is switching genres!!!! lmao awesome video

  • @MannyRataul
    @MannyRataul 3 ปีที่แล้ว

    Thank you for this video!

  • @arielfuxman8868
    @arielfuxman8868 3 ปีที่แล้ว +1

    Could you please do a video about the derivation of the cubic formula?

  • @boanergesaraujo1501
    @boanergesaraujo1501 7 หลายเดือนก่อน

    It's so tempting to put x=-1 on best friend and get 1/2. It doesn't converge to 1/2, because the series is alternating without convergence?

  • @tgjehovah3661
    @tgjehovah3661 3 ปีที่แล้ว

    i appreciate u so much...keep it up on

  • @ItachiUchiha-wk3zm
    @ItachiUchiha-wk3zm 3 ปีที่แล้ว

    Great video!

  • @Ducky_shades
    @Ducky_shades 2 ปีที่แล้ว

    Wonderful...inspiring

  • @von-lk5jw
    @von-lk5jw 6 หลายเดือนก่อน +1

    很用心

  • @LethalChicken77
    @LethalChicken77 2 ปีที่แล้ว +1

    Ah yes the only part of calc 2 that I actually found quite difficult

  • @neilgerace355
    @neilgerace355 3 ปีที่แล้ว +4

    Sqrt(2) + π = 41/9 :)

    • @n4p3r0
      @n4p3r0 3 ปีที่แล้ว +1

      \approx

    • @codywalker8565
      @codywalker8565 3 ปีที่แล้ว

      You cannot get a rational expression for pi

  • @mathevengers1131
    @mathevengers1131 3 ปีที่แล้ว +1

    If |x| is not less than 1 then it gives many illogical answers. For example put x=2 in our best friend and you will get 1+2+2^2+2^3+....= -1 which doesn't make any sense. And at 23:26 according to Ramanujan 1-1+1-1+1-1+...= 1/2
    1-2+3-4+5-6+...= 1/4 and
    1+2+3+4+5+6+...= -1/12
    I know that it doesn't make much sense but that's true according to Ramanujan.

    • @idrisShiningTimes
      @idrisShiningTimes 3 ปีที่แล้ว

      About the Summation of all Natural numbers. The answer is indeed infinity. -1/12 is just a "better" and somewhat "logical" answer.
      Consider a dirt full of random answers for the Summation of Natural numbers, and -1/12 is a Golden nugget in it. It's like that

  • @handle-4-19
    @handle-4-19 3 ปีที่แล้ว +2

    Yo big fan.

  • @mathevengers1131
    @mathevengers1131 3 ปีที่แล้ว +5

    Hey *bprp fast/versatile/explorer* do you have some time for my request as I asked earlier. Even my birthday is near. Please think about it and reply.

  • @shambo9807
    @shambo9807 ปีที่แล้ว

    Everyone watching this: learning
    Me: So how exactly is he doing that with the markers??? Magic!!! So cool!!!

  • @dinodruding5911
    @dinodruding5911 ปีที่แล้ว

    I'm studying math on my own. I'm stumped by this power series:
    \sum_{n}\left(- \sqrt{n} + \sqrt{n + 1}
    ight) \left(x - 3
    ight)^{n}
    I'm trying to apply the Ratio Test for convergence, but can't figure out how to reduce the limit involving radicals.
    Help!

  • @mathevengers1131
    @mathevengers1131 3 ปีที่แล้ว +5

    For better explanation of Taylor series you can see video of 3 blue 1 brown.

  • @andrel8243
    @andrel8243 3 ปีที่แล้ว +1

    I like your vedios. Did you ever compute the sum of all integers represented as an imaginary number? Or the sum of all the imaginary numbers without the Real component?

  • @PahanPahasara-q5v
    @PahanPahasara-q5v 13 วันที่ผ่านมา

    very interesting

  • @jagula
    @jagula 3 ปีที่แล้ว +3

    Steve: Right?
    Kevin: WRONG!

  • @jollux8035
    @jollux8035 ปีที่แล้ว

    1+1 is 2 :0 5:40

  • @tony1234665
    @tony1234665 ปีที่แล้ว

    13:47 watch the "form" change into "Form" magically

  • @Logicallymath
    @Logicallymath 3 ปีที่แล้ว +1

    I almost fell over when you said why don't we teach matrices to 8 years olds😹😹😹

    • @ObtainThePain
      @ObtainThePain 3 ปีที่แล้ว

      Why not? I never learned matrices since COVID cut my algebra class short 🤣

    • @thbeam2044
      @thbeam2044 2 ปีที่แล้ว

      Maths topics shouldn't be tied to age. Anyone can learn anything at any age, as long as they've covered the pre-reqisites

  • @johnnymusarra3732
    @johnnymusarra3732 3 ปีที่แล้ว +2

    How can I integrate 1/(x^3+2x+2) dx?

    • @justclaner1902
      @justclaner1902 3 ปีที่แล้ว +1

      integration by partial fractions

  • @abzshaker
    @abzshaker 3 ปีที่แล้ว

    you went from young boy to sensei in just 2 years...

  • @alilelo2524
    @alilelo2524 3 ปีที่แล้ว

    excellent

  • @holyshit922
    @holyshit922 3 ปีที่แล้ว

    Addition of rational numbers is different than multiplication and a little bit more difficult

  • @fatalmitake9114
    @fatalmitake9114 3 ปีที่แล้ว +1

    2:08 Funniest part of the video

  • @hukukcugenc7399
    @hukukcugenc7399 3 ปีที่แล้ว

    My teacher,which country do you live in?

  • @fernandezjedwilson5333
    @fernandezjedwilson5333 3 ปีที่แล้ว

    Can you solve this $ 3x(1+2x^2)^1/2 dx

  • @affablejoker4967
    @affablejoker4967 3 ปีที่แล้ว +1

    Solve the JEE ADVANCE mathematics portion

  • @edwingarcia5714
    @edwingarcia5714 หลายเดือนก่อน

    16:03 this guy😂

  • @Iamnotyou29
    @Iamnotyou29 3 ปีที่แล้ว +39

    Please prove that parallel lines converge at infinity

    • @johnyfausman959
      @johnyfausman959 3 ปีที่แล้ว +2

      xD

    • @jadeharley413
      @jadeharley413 ปีที่แล้ว +7

      Calmest comment in blackpenredpen channel

    • @fsponj
      @fsponj 9 หลายเดือนก่อน +1

      ​@@jadeharley413💀

    • @jagrit9718
      @jagrit9718 8 หลายเดือนก่อน +2

      They don't converge

    • @Iamnotyou29
      @Iamnotyou29 8 หลายเดือนก่อน +1

      @@jagrit9718 yea now I know ...that time I was too young to understand.🙃

  • @Iamnotyou29
    @Iamnotyou29 3 ปีที่แล้ว +1

    Please solve x^x=2x

  • @Slijee
    @Slijee 3 ปีที่แล้ว

    Hey I just got finished with a grade 9 unit on optimal surface area and volume, I made 2 formulas and plotted them on Desmos and found that for each value (a), they always intersect at (x= a^3 x pi) and (y= a^3 x pi). Here are the formulas I made, and if it helps they’re for minimum surface area for a given volume and maximum volume for a given surface area. Minimum surface area: a x pi(x/pi)^(2/3), Maximum volume: pi(x/a x pi)^(3/2). I would give photos but I can’t put any in the TH-cam comment section😂. It just popped out of no where when I was reviewing some of the past formulas I made. It would be great to see why this happens!

  • @tijitahina5423
    @tijitahina5423 2 ปีที่แล้ว

    when you have a best friend, you have to know how to use him ... It sounds so bad !! 🤣🤣

  • @ruichai6551
    @ruichai6551 2 ปีที่แล้ว

    Genius

  • @lounesbenali4889
    @lounesbenali4889 2 ปีที่แล้ว

    16:16 🤣🤣🤣🤣🤣

  • @pramodnadishkagunarathna1724
    @pramodnadishkagunarathna1724 3 ปีที่แล้ว

    🖤✨️

  • @beastgamer4932
    @beastgamer4932 3 ปีที่แล้ว

    73rd

  • @vedants.vispute77
    @vedants.vispute77 3 ปีที่แล้ว +2

    9:57 what are you saying and drawing XD lmfaoXDXD

  • @gouravmadhwal5548
    @gouravmadhwal5548 3 ปีที่แล้ว +1

    Please integrate :-
    ln(ln(ln(lnx)))

  • @caleblechler8929
    @caleblechler8929 3 ปีที่แล้ว

    I’m trying to do my Spanish homework… STAHP.

  • @沒頭像的都是打手
    @沒頭像的都是打手 3 ปีที่แล้ว +2

    Is it possible sinθ > 1?or sinθ < -1 ?
    吃叉雞囉!!

    • @blackpenredpen
      @blackpenredpen  3 ปีที่แล้ว +4

      In complex world, yes it’s possible that |sin|>1

  • @JimmyKang-tm9rx
    @JimmyKang-tm9rx ปีที่แล้ว

    Sensei

  • @jplikesmaths
    @jplikesmaths 3 ปีที่แล้ว

    RIP to those who think sqrt(2) + pi is 4.5555555555.......

  • @kinglin9139
    @kinglin9139 3 ปีที่แล้ว

    老師好

  • @اسماءعلاءالدين-ض6ح
    @اسماءعلاءالدين-ض6ح 3 ปีที่แล้ว

    I want to translate these videos in Arabic, please❤️❤️

  • @beastgamer4932
    @beastgamer4932 3 ปีที่แล้ว

    76th

  • @neilchandra1610
    @neilchandra1610 3 ปีที่แล้ว

    Did ya know that your fan stats in India are constantly growing rapidly? It is to a large extent.
    Comparable to that growth is the growth of an online learning platform in India for undergraduate school students named PhysicsWallah
    Since in yr vdos u are not covering much of Indian curriculum, u arent noticing but if you do so , u can notice the rise in yr Indian fan stats.
    Moreover , if you join PhysicsWallah as an online mathematics mentor , u will be in a symbiosis bcoz the students will love your teaching and u may as well fall in love with math in the Indian curriculum. You are earnestly requested to join PhysicsWallah.
    PS: I couldn't join PhysicsWallah as an online student due to some reasons but I watch their content they upload on TH-cam .
    #bprpjoinPW #bprpfeelIndia #welovebprp #WEAREMATHNERDS
    #WELOVEMATHS
    Movement starts right now right from here👇👇

  • @purim_sakamoto
    @purim_sakamoto 3 ปีที่แล้ว

    おう老子
    動画いつもすげえ楽しく見てるんだけど、そんな長丁場の動画を
    連続投稿して身体大丈夫なのかい
    たまにはバカンス回を入れて、ロケ行こうず!

  • @nikned27th74
    @nikned27th74 3 ปีที่แล้ว +2

    Firstttt