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1 ba0un {skg 1 2 7} ( Kh" 3 3X...

Question

1 ba0un {skg 1 2 7} ( Kh" 3 3X

1 ba 0 un {skg 1 2 7} ( Kh" 3 3X



Answers

$\left[ \begin{array}{lll}{1} & {1} & {1} \\ {1} & {2} & {3} \\ {0} & {1} & {1}\end{array}\right]$

To find these two matrices together. Here. First thing we need to do is check the dimensions will work. Okay? First matrix we've got is two rows three columns. That's a two by three. The second matrix is a three row one column matrix. These inner two dimensions have to match which they do. That means is a resulting matrix will be dimension the outer dimensions. Okay, So we're gonna have to buy one. Matrix is our answer just two spots here. Okay, we'll fill in the first spot. This is gonna be row one. Column one. Okay, so everything in row one thinks everything in column one negative one times six plus zero times negative four plus seven. Thanks one. Okay, this should give us negative six plus zero plus seven. That should give us a one in that first little spot right there. Okay, The second guy this is gonna be row two column one. Okay, so we're gonna take everything in row two times that same column right there. So three times six less negative five that was negative for plus two times one spent 18 plus 20 plus two should give us 40. Okay? So one in the first row, 40 in the second round, and that is the result of this modification.

This video's gonna go through the answer to question number 11 from chapter 9.3. So ask to use real reduction to find the inverse off the matrix. That 11 one 121 Thio three. So So we conform the combination matrix with the identity and they tried refugees. Okay, so if we subtract to you off the top equation from the bomb equation, then we're gonna get zero one that to you, minus 20 Maybe it's gonna be minus 201 on the inside. And if we should bottle subtract one of the first question from the middle equation, that's gonna be zero That's gonna be one on that's going to zero months. Well, on zero on me, the top equation as it is, Savior zero. Okay, so now we get to be a stick in court because on left inside the bomb equation on the middle or after the bottom row of the majors in the middle of the matrix. All the same, which means that the ah, the row is off the matrix linearly dependence, which by their a born in the book, means that er the identity that's all right with me

In this video, we're gonna go through the answer to question number seven from chapter 9.5 West to find the argon values nine vectors off the matrix A given here. First. Do that. We need to find the determinant off the matrix. A minus. I ascetic with syrup. So this is the determinant. Off one minus R zero zero two three minus. Ah, one 0 to 4 months are You're wasting your over the top road Got one minus r times by the deterrent box Right to Buddy Matrix, which is remind us ah times by four minus R minus two. This is gonna be a one minus ah times by Ask what minus for our minus three hours. Minus seven are plus 12 minus to which is plus 10. Good. Then we can characterize this with one minus R and it's gonna factor Rise to be Ah. Minus five, uh, minus two. So we said that equal to zero. Then solve we're gonna have I can Values are is equal to one. I was equal to two on our secret five. There are three aiken values. Find their associates. I connect this starting first with I come back to rise. Because of what? When it's find the matrix a minus one times high times, the fact that you want is equal zero up. This is just 000 Good two to you. One on zero two three touched by yuan is equal to zero safe. Let's complete this by hand. So if you want, let's let the components be ex wives that then from the second World, we've got that to x close Thio. Why course Zed is equal to zero on from the third room we've got there, too. And two, Why close? Three is equal to zero. Okay, so this his bottom equation tells us that, uh, why is equal to minus three over two times that on the top equation tells us that thanks is equal to minus that minus half that minus why that's minus half said, plus three up to said. That's just ones that so, So X equals said, Let's just let them be ones. And that why's it was minus three or two time times said, which is just three. Everything. That's a first I Greta, the 2nd 1 we calculate with a minus, the less I connect it was too. Okay. Months to I times you want you could see. Right. That's gonna be a minus. 100 two 11 zero two four months. Two is two tells about you want zero? So the first hotels is not the first component. If you want equal to zero, then the bond to Rose. Tell us that Thea, the second and third components are next to each other. So if the 2nd 1 is one that the books reminds one, let's find the third Aiken Vector. Yeah, I can. Value was five comes I times you What do you want? It was there. So therefore months 400 two minus 21 02 minus one you want you see what Zephyr therefore you want? Well, the first component cto read off. That's just gonna be zero then. Second and for components are gonna be Will be, uh, yeah, we can tell from the second or the third World that if the second component is one, then the third component is twice second bone in, which is just too. That's a final act of Beckett

In this problem, we have given the mattresses on be an oxidant remind video. The pair of each metrics is the inverse off each other. Let's consider it Mac tricks be find metrics. Be post refined, a productive metrics A and B begin the metrics which is equals toe identity mattress. Now they find a productive be into a The result of markets would be my 00 010 three do which is not equal ist white into Demetris Since the product of too many places on either side are not I'd into demand tricks. The given to my prisons are not in rows on each other.


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