i was just curious as if this is correct or not? If it's not can you show me the correct answer?
Ratio Test = an+ 1 / an
an+1 = 6n+1 6n+1
_________________ = ______________
5(n + 1) +1 (n + 1) 5 n + 2 ( n + 1)
an + 1 / a n =
6n+ 1 6n + 1 5n + 1 n 6 n
___________ ____________ * __________ = _________ =
5 n + 2 ( n + 1) 5n+ 2 ( n +1) 6n 5 (n + 1)
_____________ =
6n
______
5n+1 n
6 n
___ * _____
5 n + 1
The limit as n ⇒ infinity on the second fraction is just 1
The limit as n ⇒ infinity on the first term is 6/5 = 1.2 > 1
So.....the series diverges