00:01
Now, in this problem, we are given with these vectors.
00:04
This is vector a, this is vector b and we need to tell that does this black vector represents the vector subtraction a minus b.
00:14
This is what we have to tell.
00:16
Okay, so first you should know the basic concept that how to add or subtract two vectors.
00:22
Now, here we are subtracting these two vectors, vector a minus vector b.
00:27
So, i can write this vector as, first of all, vector is represented by an arrow like this.
00:33
Now, vector a, we can write this thing as plus of minus of vector b.
00:39
We can write this way.
00:40
It's one in the same thing.
00:42
Basically, what we are doing here is we are just adding negative of vector b to vector a.
00:50
This is what we mean by vector subtraction.
00:53
Now, how to add two vectors? so, adding two vectors is like this.
00:57
Suppose this is vector a.
01:00
I'm just taking an example here and here this is vector b.
01:10
Now, to find vector a plus vector b, you have to join the tail of the first vector to the head of the second vector.
01:21
So, just join these two points like this and this will give you vector a plus vector b.
01:32
Okay.
01:33
Now, let's come back to the problem.
01:37
So, if i sketch vector a.
01:40
So, let me first sketch the vector a.
01:45
So, this is our vector a.
01:51
Right.
01:52
Now, if i take this vector here, this shows vector a...