00:01
So in this question, we can apply that the integral a in infinity of f of x, dx is going to be equal to the limit of b goes to infinity.
00:16
I'll actually put in our actual integral here.
00:18
So limit of b goes to infinity, b, 1, and then n x, 1 over x.
00:27
So i put in our actual information there.
00:30
So now we're going to integrate and apply that u to the power of n, du, is a number of.
00:34
Equal to the u to the power of n plus 1 over n plus 1 plus c our constant c so we end up with one half times the limit as b goes to infinity of now and x squared b and 1 okay so now we're going to use the fundamental theorem of calculus where we can get this to one half times the limit as b goes to infinity, one half the limit is b goes to infinity of lnb squared minus zero.
01:21
And we get this minus zero because this is actually natural log of x plus.
01:28
This part right here was actually natural log of one squared...