Examples of using Integrals in English and their translations into Thai
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Ecclesiastic
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Ecclesiastic
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And we will later do those integrals.
So I didn't write the other two integrals down.
Line integrals over vector fields, the direction matters.
Our focus is really just to set up the integrals.
So far, we have used integrals to figure out the area under a curve.
And now, we can add these two integrals.
And then as we go into drill derivatives and integrals, you will actually understand why people probably even invented.
I'm going to do it as two separate integrals.
Now we can start trying to do line integrals with vector-valued functions.
It's going to really help us with surface integrals.
All integrals help us do is help us take infinite sums of infinitely small distances, like a dz or a dx or a dy, et cetera.
And please look it up so you can see properly drawn integrals.
Calculus: limits, derivatives, integrals, curve sketching.
And this is really the same idea we do with… the line integrals.
And then, times the integral, and now we can merge them back, because integrals are additive like that.
So we did all the substitution, everything, but we got the exact same integrals.
We went through a very similar exercise… in two dimensions when we talked about line integrals.
And in the next video I will show you how to set up more complicated triple integrals.
Let's see if we can use our knowledge of Green's theorem to solve some actual line integrals.
It's completely analogous to… what we did in the two-dimensional case… with the line integrals.
One way you can approximate it is you could use it the way you approximate integrals in general.
These 2 are going to be very valuable for us, I think, in getting the intuition for why surface integrals.
But I like to do it because I think it will give you the intuition on what's going on when we take our surface integrals.
So we can make this substitution here, make this substitution right there, and then let's see what our integrals become.
You just have to get your brain around the idea that we're dealing with the ys, that the boundaries on the integrals are now y values.
Using the text editor, you can enter arbitrary functions and solve systems of linear equations or evaluate integrals.
And then the width of each of those rectangles we know from-- well, just learning calculus or learning integrals-- the width is dx.
In the next presentation, I will do a bunch of examples-- well, as many as I can fit in to ten minutes of actually using integration by parts to solve fairly fancy integrals.
Line integral.