00:01
In this question, we are given the matrix a and we are given as a row reduced echelm form.
00:06
And we are asked to find the dimension of the row space of this matrix, of the column space, and of the null space.
00:13
So to do that, let's look at the row reduced echelchlam form.
00:19
To get the basis for the row space with matrix a, we can just take the pivot rows in the row reduced echelon form.
00:27
So therefore the basis for the row space is it consists of three matrices, or of three vectors, one zero zero one zero and zero one.
00:56
Now the basis for the column space of the matrix a consists of the pivot columns from the original matrix.
01:06
And all three columns in this case are pivot columns, as you can see from the row reduced echelan form.
01:11
And therefore, the basis for the column space consists of the three columns from the original matrix a.
01:22
Therefore, basis for the column space is, so the first vector is 4, 3, negative 6 to negative 6.
01:45
The second vector in the basis is 161, negative 3, 610.
02:00
Let's check...