00:01
To test the series converge or diverge, we can just use ratio test which we compute the limit of a n plus 1 divided by a n take absolute value.
00:22
If we compute it, we will find that it is the limit of 1 over n plus 1, 1 half to the power n and then no n plus 1, 1 half to the power negative n.
00:41
Because we take absolute value so the negative disappear.
00:45
So it will be n over n plus 1, 1 half.
00:51
So it is 1 half less than 1.
00:54
So it converge.
00:56
Now to compute the value to which it converges, we look at this power series.
01:08
We know that it is the integral of the power series n from 1 to infinity x to the power n minus 1 dx.
01:49
Oh, we can write it as a definite integral.
01:54
So it will be from 0 to x.
01:57
And in the integral, we can no longer use x, we use t here...