00:01
All right, in your question, you're told we have this matrix a, and its size is 2 by 3.
00:07
Matrix b is the size 3 by 2.
00:11
You're asked to determine whether the following operations, matrix operations, are possible.
00:17
If they are possible, we want to give the size of the result, the outcome matrix.
00:23
And if it's not possible, we're going to say d and e.
00:26
Okay, so part a, all we're doing is taking 3 times matrix a.
00:32
That is possible.
00:34
It would just go through and multiply every element of the matrix 2 by 3.
00:39
So it's possible, and the size, the resulting size would stay the same.
00:46
It would stay a 2 by 3 matrix.
00:49
So for an example here, we could have, i'll just make up numbers here.
00:53
1, 2, 3, 4, 5, 6.
00:58
This represents a 2 by 3 matrix...