00:01
We are given with the series summation n plus 6 divide with m factorial n is moving from 2 to infinity.
00:15
Here we have to check that this is convergent or divergent.
00:20
We will use here ratio test.
00:22
The ratio test says that limit of n tends to infinity of the term a n plus 1 divide with a m.
00:30
If this limit is less than 1 that means the series is convergent.
00:36
Now we will check the limit of this.
00:39
A n plus 1 is a n plus 1.
00:43
Replaced a replaced n with n plus 1.
00:47
We will get n plus 1 plus 6 divide with n plus 1 factorial.
00:55
This is equals to n plus 7 divide with n plus 1 factorial.
01:02
Now put this value here.
01:04
We will get limit n approaches to infinity of n plus 7 divide with n plus 1 factorial multiply with n plus 6 divide with n factorial.
01:20
If we open this in if we open this factorial we will get limit n approaches to infinity as it is n plus 7 and this term n plus 1 this will open up to n plus 1 into n factorial...