Bulgarian Maths Olympiad is Wild

Поділитися
Вставка
  • Опубліковано 1 жов 2024

КОМЕНТАРІ • 70

  • @PapaFlammy69
    @PapaFlammy69  2 роки тому +15

    *_Ayooooooooooooooooo! :D Liked what you saw? If so, please sub and support the channel with deez:_*
    Train your Number Theory Expertise by trying out Brilliant! =D brilliant.org/FlammableMaths
    Check out my newest video over on @Flammy's Wood ! =D ua-cam.com/video/07RavF0J24I/v-deo.html
    Support the channel by checking out Deez Nutz over on stemerch.eu/products/deez-nuts-premium-3d-cutting-board?_pos=1&_sid=3ebd4ef06&_ss=r ! :3
    Engi Watch: stemerch.com/products/the-incredibly-unrigorous-engineering-watch?variant=40377075728562

    • @oni8337
      @oni8337 2 роки тому +1

      More resources for olympiad preparation 👍

    • @domdj9476
      @domdj9476 2 роки тому

      I will watch your other channel as soon as my exams are over

    • @cliffordwilliams9597
      @cliffordwilliams9597 2 роки тому

      You know I love my Papa Flammy! Can't wait for my incredibly unrigorous engineering watch to arrive!

  • @lechat165
    @lechat165 2 роки тому +100

    9:40 if we divide by y, we still have to respect the sign of y, because if y= changes to 0>=y+3 - this one is contradiction.
    So, finally, -3

    • @ADthehawk
      @ADthehawk 2 роки тому +12

      Aah. The sign. I was so hung on this inequality until I read your comment. Thanks.

  • @steve112285
    @steve112285 2 роки тому +108

    12:51 Small error. Should be -27+19=-8, then -2 for the root.

    • @livedandletdie
      @livedandletdie 2 роки тому +5

      -27+18+1=-1×S(7) So then if x³=-8 then cuberoot of -8 is -2 and yes, (-2,-3) is an answer.

    • @RockHardWoodDaddy
      @RockHardWoodDaddy 2 роки тому +26

      Oh, yes, obviously! Sry for the confusion and thx for pointing it out! =)

    • @LilithLuz2
      @LilithLuz2 2 роки тому +20

      @@RockHardWoodDaddy you pulled out your wood on your main channel?? damn....

    • @ginalley
      @ginalley 2 роки тому

      @@livedandletdie how did you manage to do x^3 properly in the comments

    • @Morphior
      @Morphior 2 роки тому

      @@ginalley ³ you mean that? The German keyboard has ² and ³ bound to a key combination, and on mobile many keyboard apps can do ⁰¹²³⁴⁵⁶⁷⁸⁹ⁿ. Or you copy the unicode symbol from one of the many websites. Using that you can also do ₀₁₂₃₄₅₆₇₈₉ₓ btw. I find that very ⁿⁱᶜᵉ.

  • @mastershooter64
    @mastershooter64 2 роки тому +78

    day 1 of asking papa flammy to make a complex differential geometry series

    • @faker530
      @faker530 2 роки тому +4

      what even is that

    • @mastershooter64
      @mastershooter64 2 роки тому +6

      @@faker530 it's differential geometry but with complex manifolds

    • @shadow-ht5gk
      @shadow-ht5gk 2 роки тому +4

      I think that’s a little too advanced for this channel lol

    • @aarl4608
      @aarl4608 2 роки тому +7

      day 1 of agreeing with this guy ^

  • @shirou9790
    @shirou9790 2 роки тому +35

    10:14 wtf was Papa thinking here. -3 >= y >= 0 implies -3 >= 0, a contradiction.
    In fact if you do it the correct way you do get -3 = 0 and -3 = y and the y

    • @jamieashworth_
      @jamieashworth_ 2 роки тому

      so he should have found the range graphically, and then with the solutions it should be x=-2 for y=-3

  • @conando025
    @conando025 2 роки тому +18

    Either I'm stupid or there's a mistake around 10:20 because you wrote -3>=y and then wrote that -1 is a solution for y. So -3>=-1? Same for -2.
    Actually I think i found the mistake, you divided by y which is negative so the relation should have been flipped right?

    • @ADthehawk
      @ADthehawk 2 роки тому +1

      Yep. I was also confused about that. But there are certainly a lot of helpful commentators around :)

    • @trillionman2105
      @trillionman2105 2 роки тому +3

      You have to accept the result knowing that if you think he is wrong is you that can't understand: God Flammy never makes mistakes and acts from a higher dimension of intelligence and consciousness🙏

    • @ADthehawk
      @ADthehawk 2 роки тому

      @@trillionman2105 i really didn't understand what you wrote about. I just try doing a bit of "research" before saying that someone else is wrong. Nobody is perfect, including me. If I see something wrong, it's my responsibility to ascertain that it is definitely wrong before acting on it.

    • @trillionman2105
      @trillionman2105 2 роки тому +1

      @@ADthehawkof course, I was just joking

    • @eileenlim2685
      @eileenlim2685 2 роки тому +1

      The inequality is wrong, it should be y greater or equal to negative 3 but less than 0 because if y less than -3, we see that y(y+3) is a positive integer.

  • @littlekeegs8805
    @littlekeegs8805 2 роки тому +6

    I believe the final pair is actually (-3, -2), since -27 + 18 = -8, not 8.

  • @suvamkumarsahoo4462
    @suvamkumarsahoo4462 2 роки тому +2

    Define fk(n) to be the sum of all possible products of k distinct integers chosen from
    the set {1, 2, . . . , n}, i.e.,
    fk(n) = X
    1≤i1

  • @saavestro2154
    @saavestro2154 2 роки тому +5

    I love these videos of equations with eggs and wah

  • @Noam_.Menashe
    @Noam_.Menashe 2 роки тому +4

    10:14
    You forgot to take the modolus for it to be true.

  • @AymenElassri
    @AymenElassri 2 роки тому +3

    in 10:28, i don't understand how y>=0, can anyone explain to me ? :D

  • @yovo7499
    @yovo7499 2 роки тому +2

    9:41 You can't divide by y in an inequality because you don't know whether y is positive or negative lol, just use the "Wavy Curve Method"/"Interval Method" or whatever else it's called and you'll get 0>=y>=-3

  • @РадославВелчев-е2з
    @РадославВелчев-е2з 2 роки тому +3

    Greetings from Bulgaria and thank you!

  • @nalviscoming1476
    @nalviscoming1476 2 роки тому +1

    Oh shit papa flammy made a mistake let’s all rollover and hara-kiri

  • @narakarrarr6191
    @narakarrarr6191 2 роки тому +1

    Wow I am early. Love your content so much, been following this channel for years now and I won't stop as long as you don't!

  • @xinpingdonohoe3978
    @xinpingdonohoe3978 2 роки тому +1

    -27+18+1=9.
    -27+18+1=8
    You fixed it and it was still wrong.

  • @wryanihad
    @wryanihad 2 місяці тому

    Can we solve it by algebra instead of inequality?
    Lovely people bulgarian and German

  • @evelinastanchovska4171
    @evelinastanchovska4171 Рік тому

    I'm from bulgaria, the math here is one of the best in the world. I will greet you in Bulgarian-Здравейте, много си добър фламабъл мат, обичам те!!!❤

  • @Zavstar
    @Zavstar 2 роки тому +1

    Few mistakes there

  • @SyedAhmed-lv3kh
    @SyedAhmed-lv3kh 2 роки тому +1

    a uge thankyou to byyant

  • @Farduswahid31
    @Farduswahid31 2 роки тому

    I don't like unnecessary talk in your video 🤦..

  • @kiiometric
    @kiiometric 2 роки тому +1

    I love that a lot of these are from 1999, the year I was born :D

  • @alinpopescu4147
    @alinpopescu4147 2 роки тому

    For y0 we have y^2+3y>0 => y^3

  • @enochsadventures
    @enochsadventures 2 роки тому

    There should be a math/education youtuber boxing event
    I want to see papa destroy andrew copeson

  • @christcharles5766
    @christcharles5766 2 роки тому

    sorry papa, but -27 + 19 is equal to -8, you forget to add negatif sign lol

  • @solwanderer3708
    @solwanderer3708 2 роки тому

    I recommend your channel to anyone who wants a in depth guide in how to think about math. It seems to me that we're taught (USA) to think of math as esoteric and you have to have tips and tricks to solve problems. After i watch one of your videos, it always makes me want to think of ways i can tackle problems rather than try to smash my brain into the page and hope i come away with anything. Thanks, greatly appreciated.

  • @dneary
    @dneary 2 роки тому

    When you divide by a negative y, your inequality 0>= y(y+3) changes direction to 0

    • @dneary
      @dneary 2 роки тому

      It might have been nice to talk about how this is an elliptic curve too!

  • @descartes3338
    @descartes3338 2 роки тому

    Very interested in checking out your wood Papa Flammy.

  • @sanjayghimire7695
    @sanjayghimire7695 2 роки тому

    This question is as stupid as I think I'm stupid

  • @mathsprofabderrahim
    @mathsprofabderrahim 2 роки тому

    Thnk u

  • @pwootjuhs
    @pwootjuhs 2 роки тому

    garfuekd

  • @kawaichanx3
    @kawaichanx3 2 роки тому

    Papa I'm first

  • @danthompson5115
    @danthompson5115 2 роки тому

    Hmmmm nice.

  • @karthikk5384
    @karthikk5384 2 роки тому

    Papa bless me

  • @idancohen4753
    @idancohen4753 2 роки тому

    Isn't it -8 and -2?

  • @kensmusic1134
    @kensmusic1134 2 роки тому +2

    -27+19=-8, and the cuberoot of -8 is not solvable in the integers 12:43 (I was incorrect, even by evaluating the complex roots, you get a real solution of -2. he still evaluated the wrong root though)

    • @bjornfeuerbacher5514
      @bjornfeuerbacher5514 2 роки тому

      You can't take the cuberoot of -8 directly, right. But nevertheless, the equation x³ = -8 has the solution x = -2.

    • @kensmusic1134
      @kensmusic1134 2 роки тому

      @@bjornfeuerbacher5514 yes that was his reasoning though

    • @bjornfeuerbacher5514
      @bjornfeuerbacher5514 2 роки тому

      @@kensmusic1134 Actually, he took the cuberoot of +8, since he made an error in the preceding calculation.

    • @kensmusic1134
      @kensmusic1134 2 роки тому

      @@bjornfeuerbacher5514 yes, but with the correct calculation, this argument does not make sense, which was my point

    • @xinpingdonohoe3978
      @xinpingdonohoe3978 2 роки тому

      No, the cube root of -8 is solvable in the integers. As an odd root of a negative number, the principle root is negative (so obviously real), and in this case is also an integer.

  • @denisedattilo7880
    @denisedattilo7880 2 роки тому

    PLEASE write LARGER! Thanks 👍!!