00:01
Okay, so this is a long question.
00:05
We have four parts to it.
00:08
So we are giving a vector valued function and we are asked to evaluate it at different places.
00:14
So r of 1 means that we're going to take out all of our t's and we're going to replace them with 1.
00:19
So when we do that, we end up with a 1 half i and then a t minus 1.
00:31
Or 1 minus 1 would be 0 in the j direction.
00:34
So we just write that as 1 half i.
00:37
You do not write the component that has been zeroed out.
00:42
Okay, for our next one, we're going to do r of 0.
00:45
So now when we put the 0 into our i component, it's the first the one that zeros, and then we have minus a negative j...