00:01
Now, in this question, we look at discrete time signals, right? when you think about discrete time signals, for example, you have signals like this, right, and something like going like this, and you have discrete points, right? and of course, you can basically, you can regard a signal as a vector.
00:18
And each point gives you a basis, right? and the height of this gives you the coordinate, right? so based on this idea, let's look at the question.
00:29
So basically you're giving two time signals.
00:31
So basically you get two kind of vectors, right? you have the f and you have the g, right? so let's look at the vector f first.
00:39
And of course, we can write it as we just need to put on the coordinates, right? so if you look at the graph, which shows f, which is a left graph in the question, and you see that the first coordinate, which is the height of the signal, right? and of which is one, right? and the second one is minus two, right? and the third one is four, right? and the fourth one, of course, is minus two as well.
01:01
And then you have the two and you have a minus one...