00:01
Again, we want to use a remand sum to estimate this volume.
00:07
First we're going to use the lower right hand corners.
00:13
So what do we need to first do? well, we drew our grid, m is 2, n is 3, our delta area is going to be 2, right? this is the length of 2, this is the length of 1.
00:28
So next we're going to have to find f of, well, the first point here is going to be two common negative one plus let's do four common negative one.
00:48
That's this guy here.
00:50
And we're going to continue in the same fashion get all these red points, right? these are the x values and these are the y values.
00:59
And this guy here is our f of x, comma, y.
01:03
So we've got 2 -0 plus 40 plus 2 -1 plus 2 -1 plus 4 -1.
01:25
So we've got two times, well, if we plug in 2 for our x value and y equals negative 1 for our y value, we will get negative 1...