00:01
So in this problem, we are given the unit disk.
00:02
So let us begin by sketching the region.
00:04
So here we have our disk.
00:06
We have the y -axis and the x -axis, and the radius for this is 1.
00:10
Where is the region? the region here would be everything that is within the disk.
00:15
That is, we have a polar region, and we're going to use capital d to label this polar region.
00:23
So d here is a region, and d here is a polar region.
00:27
If we have to describe this, well, d a will be written as r d r d theta, because polar regions.
00:35
R here ranges between the values of 0 and 1, while theta, theta ranges between the values of 0 and 2 pi.
00:43
Also, keep in mind that x squared plus y squared in polar coordinates becomes r squared.
00:50
All right, with all of that said, now we are given the vector field f with the variables x and y, and it has two components.
00:58
The first component is the square root of 1 plus x squared, and then the second component would be y squared times x plus x to the power of 3 divided by 3.
01:11
Now, let's say that the two components for the vector field are p and q...