00:01
Ok, so let's get started with the integral from 1 to 2 of f ' of 5x dx.
00:12
Well, this guy here is what? here we are going to have f of 5x over 5 evaluated between 1 and 2.
00:22
So we get 1 over 5 multiplied by f of 10 minus f of 5.
00:31
And this guy here is 1 over 5 multiplied by f of 10 is 1, f of 5 is negative 4, so 1 plus 4.
00:43
And so we get 1.
00:44
Now for the second integral, the integral from 1 to 2 of f ' of 3x dx.
00:52
Well, this one is 1 over 3 multiplied by f of 3x evaluated between 1 and 2.
01:00
So we get 1 over 3 multiplied by f of 6 minus f of 3.
01:09
And f of 6 is 4, f of 3 is 10, so we get 4 minus 10, negative 2.
01:20
Perfect.
01:21
Now, the integral from 1 to 2 of f ' of 5x plus f ' of 3x...