61 Upper and lower triangular matrices #math #linear #algebra

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61 Upper and lower triangular matrices #tuto #tutorial

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Комментарии
Автор

Every single video of tthis just shows with the right numbers. What needs to be done if you cant make a zero so easly? Where to multiply?

LaurisKairo
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Thank you for the explanation. The video was really helpful. Cheers

umarbashir
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Just found your video and it was a good explanation on the conversion. I tried doing it myself by pausing the video and what I got for the determinant is -30. I didn’t perform all the same operations that you did but I was still able to get the matrix into upper triangular form. My confusion is coming from the fact that we aren’t getting back the same results. I did the same operation as you for R3 and R4 in the same exact order. I then went on to get -3 in column2 to become 0 by the operation “R3= 2*R3 + 3*R2” and the 4 in column 3 to 0 by the operation “R4=5*R4 + 4*R3”. What I ended up with is multiplying 1*2*-5*3 = -30 as the determinant. Can you please help by explaining to me where I went wrong because I need help.

ehmzz
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Saved me today Ty for such a helpful video

Glaciate
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Can the determinant will result a different answer when the way you eliminate numbers have different method to become zeros?

ralphbensonvaldez
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why wouldnt you multiply 3 to the determinant if you multiplied it in the row

danielkim
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wait why didn;t u just do R3' = R3+(3/2) R2

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