00:01
All right, so we're working on integrals here.
00:02
Now, to solve an integral, we need to find something that we call the anti -derivatives.
00:08
So we need to work backwards on the derivative.
00:12
Once we have that anti -derivative, then we can just plug in the two values of the integral, find the values for those functions, and subtract them.
00:21
So i will show you what that looks like.
00:23
So we have an integral here of x -d -x on the interval 3 to 6.
00:29
Now, x looks like our derivative function where we would have a power, and we would move that power down or that exponent down, and go one less on the power.
00:45
So now we need to go backwards.
00:47
So right now, i have an unwritten one right there as a power.
00:52
So working backwards, i would go up to a two.
00:56
Now the problem is, if i take the derivative of x squared, that 2 moves down, and i end up with 2x.
01:05
But we can see from the integral i don't have a 2 out front...