Determinant of 3x3 Matrices, 2x2 Matrix, Precalculus Video Tutorial

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  • เผยแพร่เมื่อ 28 ส.ค. 2024

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  • @TheOrganicChemistryTutor
    @TheOrganicChemistryTutor  ปีที่แล้ว +27

    Final Exams and Video Playlists: www.video-tutor.net/
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  • @MikeMike-yc8gg
    @MikeMike-yc8gg 4 ปีที่แล้ว +10

    1:54 bookmark - the first thing you want to do is get "rid" of the first row and column and notice what you have "leftover" ( In this case its b2 ,c2
    b3 , c3 . ) so a1 is a 2x2 matrix which is b2 , c2 ,b3 , c3 .
    2:05
    using b1 and crossing everything is around it ( since b1 is in the first row and second column we cross out the first row and second column , and are left with a2 , c2 , c2 , c3 2:37
    3:23 - after you use the formula to have everything "setup" use the method of a 2x2 matrix (where. * ad-bc )
    3:35 first example
    6:15 adding all the numbers to get the determinant of out 3x3 matrix in this first example .
    6:49 - second example

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    @terrancepage9163 ปีที่แล้ว

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    @georgesadler7830 2 ปีที่แล้ว +1

    MR. Organic Chemistry Tutor, thank you for a solid video/lecture on How to find the Determinant of a 2X2 and a 3X3 Matrix/Matrices in Precalculus.

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  • @talalalobaid2228
    @talalalobaid2228 4 ปีที่แล้ว +4

    At 4:30, why did you subtract 4 and then add -3. Should it be - (-3)?
    Edit: when I watched the second example, he used it again, so I guess it's a rule. Please correct me if I'm wrong.

    • @WolfGirl45100
      @WolfGirl45100 3 ปีที่แล้ว +2

      It's been quite some time but for anyone that needs it, I believe you are supposed to alternate signs starting with the number in the first row
      Ugh I can't explain it properly but for the example you have timestamped it'd be
      +2 -(-4) +3
      So it goes positive-negative-positive
      Likewise if you chose the first column it'd be
      +2
      -(+5)
      +(-8)
      Pretty obvious but
      Positive
      Negative
      Positive
      Can you see the pattern?
      I'm sorry I can't put to words adequately

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      @pelingezer6538 3 ปีที่แล้ว +1

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    @will_hunt_music ปีที่แล้ว +1

    Awesome tutorial, quick and easy. Thanks!

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    @josephadamik89 3 ปีที่แล้ว +3

    Your videos are excellent. I am studying more advanced matrix algebra and wondering if you have any more videos on the subject. I do not see them in your list.

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    @standrickikilenage8433 ปีที่แล้ว +1

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    @ntandomapako8851 2 ปีที่แล้ว

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    @user-jv1dy5fj3y 10 หลายเดือนก่อน

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    @VISHALTRIPATHIBTECE 3 ปีที่แล้ว

    The video was really simple , germane and helpful.

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    @lukeharris8470 ปีที่แล้ว

    this video not only made it much simpler but did it 6 times faster than my uni course lecturer

  • @MicroBugs
    @MicroBugs 3 ปีที่แล้ว

    Thanks, now it's very clear to me what is a matrix determinant!

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    @kennedyxhulu4933 4 ปีที่แล้ว +16

    A topic we learnt at school for a week in 10 minutes wow. I wasted my time

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    @henriquevalente3277 3 ปีที่แล้ว +1

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    @lalayatem3758 ปีที่แล้ว

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    @Veeproid ปีที่แล้ว

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    @malr19 ปีที่แล้ว

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    @anitamartey7475 2 ปีที่แล้ว

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    @jemilunoah7753 2 ปีที่แล้ว

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  • @natevideos263
    @natevideos263 2 ปีที่แล้ว +1

    Very helpful video, but the thumbnail for this video shows the det = ab - cd, it should be = ad - cb.

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    @VeraTenguh-ty1op ปีที่แล้ว

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