00:01
Determine the values of m such that the rank of the matrix is 2.
00:11
So we have this matrix, 1 negative 1 -0.
00:28
Second row is 2 -35.
00:38
Third row is 1 -2m.
00:52
Okay, so first we need to rewrite this in a row -achlan form.
01:03
So we have, okay, let's call this first row, second row, and this third row.
01:10
So we use second row to minus 2 times the first row, and reassign this to the second row.
01:17
So i got negative 1 ,0, 0, 5, 0, 2m.
01:41
And then the next step is i use third row, maybe change the color, 2 minus 2, 2 minus the first row, and assign this to the third row.
02:01
So i have 1 negative 1, 0, 0, 0, 0, 0, 3m, okay? okay, i think i got a mistake.
02:29
Here is 5, not 0...
