Hello, Rosey!
Here's the second one . . .
Use the ratio test to find convergence or divergence: .
. .
Divide top and bottom by
. . .
Then: .
Since , the series converges.
I was wondering if I could get some help on these two problems...
Find the interval of convergence....
And use the ratio test to find convergence or divergence....
Thanks, I'd really appreciate it. Some of it is done, but I am unsure of what to do from what I've got.
[quote=Rosey;299537]
Find the interval of convergence....
Ratio test would break this guy
Simplifying we get ...
5<x<9.
We test the end points by pluging 5 and 9 into the original question.
Doing that for 5 we obtain.
Which converges by alternating series test.
When we plug in 9 we get
Which converges by comparison test
So the interval of convergence is
[5,9]
Radius of convergence is 2