- #1
sgonzalez90
- 6
- 0
Good evening, I'm an electrical engineering student questioning my answer to this series Region of Convergence problem.
Ʃ(0,inf) (n(n-1)(z+5i)^n)/n
Using the ratio test lim n-> |an+1/an|
I was able to get it down to lim n->|n(z+5i)/(n-1)| which gave |inf/inf| = 1, which means the test fails. What do I do to properly solve this? :(
Ʃ(0,inf) (n(n-1)(z+5i)^n)/n
Using the ratio test lim n-> |an+1/an|
I was able to get it down to lim n->|n(z+5i)/(n-1)| which gave |inf/inf| = 1, which means the test fails. What do I do to properly solve this? :(