00:01
Hello, welcome to this lesson.
00:02
In this lesson, you're looking for the value of a site that the set a1, a3 will no span our 3.
00:13
So here, if we form a matrix with a1a2 and a3 as the columns of the matrix, and we find the determinant.
00:22
If the determinant is zero, all right, then it means that a1, a2, and a3 are not.
00:32
Linearly independent right and as such a cannot span the out of three so here let's form a matrix a whose column would be the a1 e2 and the vector e3 so would have six three and negative three then would have each negative two and four then again we have negative ten negative two 4.
01:06
So looking at the properties of the determinant of the matrix, now if two columns are exactly the same, then would have a matrix where the determinant reaches zero, all right? so for here, you see that h, if it equals negative 10, would have a zero determinant for the matrix, all right? but we can find it, we can look for it...