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Problem 3: (LO Points) Consider the matrix:[; ;% Compute the determinant? Find adj(A) Give the mnverse of the matrix?...

Question

Problem 3: (LO Points) Consider the matrix:[; ;% Compute the determinant? Find adj(A) Give the mnverse of the matrix?

Problem 3: (LO Points) Consider the matrix: [; ;% Compute the determinant? Find adj(A) Give the mnverse of the matrix?



Answers

Find the determinant of the matrix in the given exercise. Exercise 3

All right. And this exercise, you won't take the determinant of this matrix of it exists. So what we do to make sure that we continue determine it is check the dimensions of the Matrix. So what is it like it x by? Why? What is the exit way? For example, if we have a square matrix, we can take a drifter minute. Like to buy two or three by three. So on. But here, let's see, we have a two one to buy. Once we have a two violent matrix. And because it's not a square matrix, we can take a determinant.

Other everyone This wasn't able to find out. I get and learn for this new automatic so and we can take one. There are two roads but column is only one. So this is to cross one minute break. So as we can take, this is noticed this parametric. So we cannot find fine for this magic. Nobody noticed Smartmatic. So these on sir. Thank you.

Here. We want to find a determine if it exists. Because it's a square matrix are determined, does exist. So we want the first diagonal minus sec title. So we multiply three over to buy negative to over three, three over to buy negative to over three in this equals negative one castle. It three cancel the to Then we have negative one minus the second angle. So one times negative. What? That's negative. So here we get negative one plus one. Let me The determinant is zero.

Let's find a determinate, this matrix so we can because it's a square and all I could do is multiply the diagnose and subtract them. So we first have first diagnosed. We do first diagonal minus second diet Dagnall. So we have two times three, which is six minus second diagnosed zero times zero is zero and that means the determinant this six


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