00:01
Now over here we've been given two matrices.
00:04
So in the first part we've been asked to find out a plus b.
00:09
So how do you find out a plus b? simply for that, what we'll do is we'll just add up the respective elements.
00:16
As in, what i'm trying to say is if you just take up the first element, i mean the first element of the element of first row and first column of matrix a, then you'll take the same element.
00:27
That is the element of the first row and first column of matrix b as well.
00:32
So that makes 4 plus 1 that is 5.
00:35
Then i'm talking about this one now.
00:38
5 plus 0 that will give you 5 again.
00:43
Similarly, minus 1 and minus 2.
00:45
If you just add it up, you'll get minus 2.
00:48
So what i'm doing over here, i'm just adding up the respective elements, the corresponding elements rather you can say.
00:55
Right.
00:55
So this is a matrix a plus b, right? this is in front of you.
01:01
Now, coming on to the second part, we've been asked to find out a minus b.
01:07
Again, this is just the same thing.
01:09
You just have to subtract the corresponding elements now.
01:13
In the previous part, we were adding up.
01:15
Now we'll just subtract.
01:16
So what we'll do now? what do you do simply? just this 4 and 1 from this matrix.
01:22
So 4 minus 1, that will give you 3, then 5.
01:25
Minus 0 that will give you 5 again then minus 1 and minus 1 so minus 1 minus 1 that is minus 1 plus 1 so you'll get 0 okay so similarly just subtract the corresponding elements and you'll get the matrix a minus b so this is the matrix a minus b now okay coming on to the c part now what we are supposed to find over here is 3a so 3 over here is nothing but a scalar quantity...