00:01
In this question, for each of the given series, we need to determine whether it converges or diverges.
00:05
The first series is sum n is equal to 1 to infinity minus 1 to the whole power n, n power minus 1, i n of n plus 5.
00:15
So it is converges, but it is not absolutely convergent.
00:32
So the answer for this series is c.
00:36
And for the second series, sum n is equal to 1 to infinity minus 2 n the whole power n by n power 6n.
00:47
So this is diverges.
00:50
So the answer is option b.
00:56
And for the third one, it is sum n is equal to 1 to infinity n cube by 2 minus 5n the whole square, the whole power n.
01:10
So this is converges, but it is not absolutely convergent...