Quick determinant trick

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  • Опубликовано: 2 ноя 2024

Комментарии • 125

  • @AnkitSharma-ef7md
    @AnkitSharma-ef7md 3 года назад +82

    I just love the way professor drops his marker at the end proving that he is the boss.
    It is a nice rule to calculate determinant. Professor, I guess it is called "Sarrus Rule".
    Please correct me.

    • @floccinaucinihilipilificat6749
      @floccinaucinihilipilificat6749 Год назад +6

      i prefer to call it the "rule of sarrus" cause that makes it sound like a wizard spell

    • @salmazubair
      @salmazubair 4 месяца назад +1

      Does it work on any matrix 4*4, 5*5 ?

  • @kormosmate2
    @kormosmate2 3 года назад +35

    A fascinating thing about this method, is than you can "use" all sides of the matrix. Meaning you can copy the last two columns to the left side of the matrix, and here's the punch line, you can even copy the respective rows to above or below the matrix, and make similar diagonals. It will yield the same result!

  • @bsmith6276
    @bsmith6276 3 года назад +11

    This is precisely the method taught to me when I was first introduced to determinants in my high school algebra class.

  • @jaikumar848
    @jaikumar848 3 года назад +30

    Dr payam! Any shortcut to find inverse of matrix?

    • @thomasthedankengine5400
      @thomasthedankengine5400 3 года назад +2

      The best method I've found has been Montante's method. It is in my opinion faster than any other.

    • @adityadwivedi4412
      @adityadwivedi4412 3 года назад +1

      Adjoint is the fastest acc to me

    • @pinklady7184
      @pinklady7184 3 года назад

      jaikumar848 I was hoping that too.

    • @youkaihenge5892
      @youkaihenge5892 3 года назад

      For any square matrix just set it up as A = [v1,...,vn | I ] and do Guassian Elimination until you arrive at A^-1 = [ I | v1,...,vn]. Where I= identity matrix of the particular n×n size that is being inversed. Check the determinant 1st or else your doing useless computations!

    • @MRdg005
      @MRdg005 Год назад

      See Nishant vora sir video... He has given one step trick to find inverse

  • @visitor--
    @visitor-- 6 месяцев назад +3

    I'm so happy this professor still replying to others comments,nice trick i was looking for a short-cut to find the determinant of 3×3,thanks sir it helps me a lot

  • @JustAaryeah23
    @JustAaryeah23 Год назад +2

    THE PEN DROP WAS SO SATISFYING ......LIKE U NAILED IT

  • @antflam7473
    @antflam7473 Год назад +5

    I know this vid is 2 years old but dude. Literally awesome. Saved so much time when I just needed a quick refresher on how to do the problem. I went to organic chemistry tutor; he literally did something way more complex than what we did in class (he still isn't bad though) GG im dropping a sub

  • @prasadmarathe7332
    @prasadmarathe7332 8 месяцев назад +1

    Thanks a lot sir the trick is so helpful ❤😊

    • @drpeyam
      @drpeyam  7 месяцев назад

      Most welcome 😊

  • @RohanShah-k4j
    @RohanShah-k4j 11 месяцев назад +2

    You need more subs. As a Rutgers student taking lin alg this is a life saver ty. I hope this comment can make your day.
    I know video is old but the thing about math is that new students are born every day.

    • @drpeyam
      @drpeyam  11 месяцев назад

      Thank you so much!! It really means a lot to me 😁 I almost went to rutgers to teach actually!

  • @optimisticallydead8819
    @optimisticallydead8819 5 месяцев назад +2

    You are a life saver🤧❤

  • @Jaojao_puzzlesolver
    @Jaojao_puzzlesolver 3 года назад +13

    How I finish my math test with *style* 1:11

  • @vivovivi5703
    @vivovivi5703 3 года назад +28

    It's sarrus method isn't it?

    • @Apollorion
      @Apollorion 3 года назад +4

      Yes but no: it is not the case that it isn't sarrus method because it is the Rule of Sarrus aka Sarrus's rule aka Sarrus' rule.

    • @adarshabasnet2491
      @adarshabasnet2491 3 года назад +2

      @@Apollorion what? Its the same thing.

    • @popkornking
      @popkornking 3 года назад

      He's just memeing

  • @otaku8783
    @otaku8783 11 месяцев назад +1

    I learned a new way to solve determinant

  • @kachidawarrior5232
    @kachidawarrior5232 3 месяца назад +2

    does this trick work for the 4 x4 matrix too??

  • @pinklady7184
    @pinklady7184 3 года назад +1

    Inverse of matrix next, pretty please.

  • @jamesjohn2537
    @jamesjohn2537 3 года назад +1

    Supper easy method! Thanks a lots

  • @robsbackyardastrophotograp8885
    @robsbackyardastrophotograp8885 3 года назад +1

    Good stuff- I love the two column method! Looking fresh in the new channel pic :)

  • @JackKing-b4u
    @JackKing-b4u Месяц назад

    The mic drop at the end lol, legend

  • @amosbanda9637
    @amosbanda9637 5 месяцев назад +1

    I love the ending 😂😂😂

  • @orangeinfotainment620
    @orangeinfotainment620 3 месяца назад

    thank you man!

  • @justrandom072
    @justrandom072 4 месяца назад

    you just saved me a lot of time thank you man 😁

  • @Tharun-wk6rj
    @Tharun-wk6rj 10 месяцев назад +2

    This is the smartest golden retriever ive ever seen

  • @spaceandtimescience6080
    @spaceandtimescience6080 3 года назад +1

    Make a video on polar conatruction or geometric bundles

  • @pinklady7184
    @pinklady7184 3 года назад

    Great method! 😍😍😍 I have just created a *bookmark* with your problem & solution and slipped that inside a thick calculus book.

  • @Brixxter
    @Brixxter 3 года назад +2

    A shame this doesn't work for R^4 and above

  • @kamlesh25kr
    @kamlesh25kr 3 года назад

    Sir you are just amazing, thanks for great tricks.

  • @mike_the_tutor1166
    @mike_the_tutor1166 3 года назад +2

    Pen drop is the new QED. Change my mind.

  • @shahzebAli2001
    @shahzebAli2001 2 месяца назад

    😂 Just loved your actions ❤

  • @Motishay
    @Motishay 8 месяцев назад

    Holy shit THANK YOU

  • @sharpnova2
    @sharpnova2 3 года назад

    technically this method uses more multiplication operations than the regular way. (if I'm not figuring incorrectly, it uses 12 multiplications and 5 additions and the regular way uses 6 multiplications and 5 additions.. but the sign flips across the sub determinants probably count as multiplications as well so the two methods are hard to compare)
    but it very beautifully illustrates the wrap-around symmetry of matrices. you could append columns on the left or rows above and below and it would work as well
    very nice

  • @umerfarooq4831
    @umerfarooq4831 3 года назад

    I needed this thanks so much I'm constantly looking for videos which make functions easier "sweet 16"

  • @AlexGreeneHypnotist
    @AlexGreeneHypnotist 3 года назад +4

    There'll be an extra helping of sacrificial grain at the altar of Hypatia, Leibniz and Gauss tonight.
    Why couldn't they have taught us this at school when I were a lad?

    • @PeterBarnes2
      @PeterBarnes2 3 года назад +3

      They did kind of. The standard method is exactly the same but with no intuition for the nice symmetries of it with all the parallel diagonals and anti-diagonals, because the standard method just doesn't illustrate how the columns wrap around (demonstrated here by drawing copies of the columns).
      There is a problem, though, because 4x4 and larger matrices include products which aren't over straight lines, diagonal or anti-diagonal.

    • @Brien831
      @Brien831 3 года назад +1

      @@PeterBarnes2 lets be honest here, anyone past the first semester at university never calculates a determinant by hand anyways. Except for 2 by 2 matrices and other simple cases.

    • @PeterBarnes2
      @PeterBarnes2 3 года назад

      @@Brien831 I'm in community college still, but I'll go along with that, sure.

  • @houseflyer4014
    @houseflyer4014 3 года назад

    My friends say i draw my matrix brackets weird.
    Nice to know someone qualified uses the same ones as I do.

  • @Kdd160
    @Kdd160 3 года назад +4

    Well, isn’t it the sarrus rule??

  • @tomoki-v6o
    @tomoki-v6o 3 года назад +1

    Regle de Sarus !

  • @Akihikoo_
    @Akihikoo_ 3 года назад

    Thanks!

  • @yabaliyu3418
    @yabaliyu3418 9 месяцев назад +1

    Yes we believe it -10

  • @AwaisAli21m
    @AwaisAli21m 2 года назад

    Thank you very much 😘

  • @ntandoyenkosizungu7011
    @ntandoyenkosizungu7011 2 месяца назад

    Thank You🔥🔥🔥🔥🔥🔥

  • @cancer101thefundamentalsof4
    @cancer101thefundamentalsof4 3 года назад

    Peyam's maid: "What the f%$# are all these marks on the floor all the time?"

  • @AlfonsoNeilJimenezCasallas
    @AlfonsoNeilJimenezCasallas 3 года назад

    Genius!

  • @qubit01
    @qubit01 3 года назад

    die gute alte jägerzaun-regel

    • @raba2d723
      @raba2d723 2 месяца назад

      speak english

  • @PositronQ
    @PositronQ 3 года назад

    Good trick

  • @abishithjoy
    @abishithjoy Год назад

    Dr payam sir........
    You are as God to me
    Thank God
    This is a big ticket to pass the 12th exam 🙏🏻🙏🏻🙏🏻🙏🏻

  • @ezu8501
    @ezu8501 Год назад

    my man

  • @trickypediaajoychetry
    @trickypediaajoychetry 3 года назад

    Its a trick which consumes more time than actual method❤

  • @mistadude
    @mistadude 11 месяцев назад +1

    why doesn't this work on 4x4 matrix

  • @azhar07464
    @azhar07464 3 года назад

    Wow. Didn't know about that.

  • @sreelekshmisaji1043
    @sreelekshmisaji1043 3 месяца назад

    I luvvv itt❤❤❤

  • @dr.rahulgupta7573
    @dr.rahulgupta7573 3 года назад

    Sir Is this method a Sarrus method ? DrRahul Rohtak Haryana India

  • @matteovetri
    @matteovetri 3 года назад +1

    TyrannoSarrus rex 🦖

  • @anaskhalid2862
    @anaskhalid2862 6 месяцев назад

    Can I use this method in exams. If the questions says "Find the determinant without expanstion (by using properties)."

    • @drpeyam
      @drpeyam  6 месяцев назад +1

      Sadly not

  • @NaodWedi
    @NaodWedi 8 месяцев назад

    Thanks bro i am tired to find it😮😮😮😮

  • @halfmillion9057
    @halfmillion9057 11 месяцев назад

    how to use it on 4*4? need a quick help

  • @rohunse5555
    @rohunse5555 3 года назад +1

    Nice

  • @harshchikorde9495
    @harshchikorde9495 3 года назад

    Awesome

  • @hsjkdsgd
    @hsjkdsgd 3 года назад

    You're gonna damage the tip of marker pen doing that stunt in the end😀

  • @Potatoedits17
    @Potatoedits17 Год назад

    That's fcking Sarrus rule, dammit

  • @Psjt9230
    @Psjt9230 3 года назад

    Great 👍👍

  • @mohamedallouche5873
    @mohamedallouche5873 4 месяца назад

    did i just learn this in my last year of college ? OMG my method was way harderrrrrrr

  • @thinkjin
    @thinkjin Год назад

    U r legend

  • @charleyfeng2054
    @charleyfeng2054 3 года назад

    Isn't this just the permutation definition of the determinant, from which the commonly used method is derived from?

  • @ShauryaVermaaaa
    @ShauryaVermaaaa 14 дней назад

    i belive u r not good , u r god

  • @bprpfast
    @bprpfast 3 года назад

    Next time, drop your phone at the end of the video

  • @MokshagnaGoudK
    @MokshagnaGoudK 3 месяца назад

  • @alfiealfie35
    @alfiealfie35 3 года назад

    Is this generalisable to higher dimensions?

  • @benque7491
    @benque7491 8 месяцев назад

    lmao my teacher taught this on our regular class already

    • @drpeyam
      @drpeyam  8 месяцев назад

      Good for you?

  • @adityadwivedi4412
    @adityadwivedi4412 3 года назад

    I thinkyou are teaching linear algebra this semester

  • @himanshucj261
    @himanshucj261 8 месяцев назад

    How will I apply in 4×4 matrix

    • @drpeyam
      @drpeyam  8 месяцев назад

      It doesn’t apply, unfortunately

  • @sfarsi6
    @sfarsi6 3 года назад +2

    -5*-2 isn't 10 ?

    • @畢瀏明
      @畢瀏明 3 года назад +2

      There's one more -1, so finally -10

    • @sfarsi6
      @sfarsi6 3 года назад

      @@畢瀏明 I didn't see that minus

  • @manjumanl5279
    @manjumanl5279 3 года назад

    I just created a playlist called shortmathculc ,next video is how to calculate the inverse of a Matrix.

  • @abhisekpanda5165
    @abhisekpanda5165 3 месяца назад

    Rank = 58 or 19 ?

  • @negativespace5035
    @negativespace5035 3 года назад

    nice sir

  • @Cs_aadda
    @Cs_aadda 5 месяцев назад +1

    OMG UNBILIVABALE

    • @Cs_aadda
      @Cs_aadda 5 месяцев назад

      hello sir can plaese make eigen vector shotcut trick because my exam is coming plese ASAP. I AM ALREDY CHECK IN PLAYLIST BUT NOT AVAILABLE

  • @SahilTrumboo
    @SahilTrumboo 3 года назад +32

    Who knows the trick already 👇👇👇

  • @מאוראנגלנדר-מ8ז
    @מאוראנגלנדר-מ8ז 3 года назад

    Cool

  • @Wylan_Gao
    @Wylan_Gao Год назад

    goat!

  • @sonusaini-nm9xc
    @sonusaini-nm9xc 3 года назад

    Wow

  • @adwans1491
    @adwans1491 3 года назад +1

    You believe -5 x -2 is -10 ?

    • @drpeyam
      @drpeyam  3 года назад

      You forgot about the extra -1

  • @jeremycai5870
    @jeremycai5870 3 года назад

    Lol I've seen this method from a manga...

  • @pawankumar-hk5fn
    @pawankumar-hk5fn 3 года назад

    I already used this .. before

  • @jfcrow1
    @jfcrow1 3 года назад +1

    Trick yes. But is it computationally more efficient. No

  • @physjim
    @physjim 3 года назад

    ok, but why?

  • @rui_i139
    @rui_i139 3 года назад

    Sarruss

  • @wduandy
    @wduandy 3 года назад

    Laplace >>>> Sarrus

  • @juma21347
    @juma21347 3 года назад

    How is that any better than Sarrus? You are literally doing the same operations plus you have to write the extra lines

  • @tomzwinkels6940
    @tomzwinkels6940 Месяц назад

    This man -2×-5=10 not -10

  • @lenamaral6055
    @lenamaral6055 3 года назад

    I always preferred the method of triangles over Sarrus' rule. 😉

  • @tgx3529
    @tgx3529 3 года назад +2

    This is any trick. This is a rule os Sarrus

  • @titirshachakravarty9522
    @titirshachakravarty9522 3 месяца назад

    Pen drop

  • @ravizsz
    @ravizsz Год назад

    Answer isn't coming