00:02
Okay, definitely a conservative function here, right, because what the information is given, they want us to find this.
00:08
So, df dx is 2xz plus y squared, right, integrate this to find, with respect to x of course, 2x squared over 2, so x squared z plus xy squared plus g of y and z, okay.
00:37
Now take the derivative of this with respect to y, and the first one goes away, the other one, 2xy plus g prime of yz, or actually, yeah, that's fine, and is equal to, is going to be equal to this, 2xy.
01:00
So then g, g is going to be some kind of a function of z, okay.
01:10
So then f is, f of x, y, z is x squared z plus xy squared plus h of z.
01:25
Now take the derivative of this with respect to z, we get x squared plus h prime of z, which is equal to the third component, z component, x squared plus 6z squared, x squared cancels out, so h of z is 6z cubed over 3, which is 2z cubed plus c.
01:56
So the potential function, which is this little f, is x squared z plus xy squared plus 2z cubed plus c, okay...