00:01
Okay, so we have these two vectors u and v.
00:03
The first thing we want to find is 2u.
00:07
So this is 2 times the vector 3, 2.
00:10
So when we multiply a vector by a constant, we have to multiply every entry by this constant.
00:16
So this becomes 2 times 3 and 2 times 2, which is 6, 4.
00:24
So all we do is multiply every entry by the constant.
00:27
And then minus 3 v.
00:31
Well, the same concept here, we have minus 3 times the vector 6, 8.
00:36
So we have to multiply every entry by this constant.
00:41
So this is minus 3 times 6 and minus 3 times 8, which is minus 18, minus 24.
00:53
Next, we want to do u plus v.
00:56
So this is 3, 2, 2.
00:59
Plus six, eight.
01:02
When we add two vectors together, we add them component -wise, so we add the first components, and then we add the second components...