- #1
Fiz2007
- 6
- 0
Homework Statement
find the interval of convergence of
[tex]\sum[/tex][(2k+1)!/((2k)((k!)2)]* [xk]
Homework Equations
Ratio Test
The Attempt at a Solution
I already found that it converges on (-1/2, 1/2) by using power series with b=0 and testing the rest of it as ak. However, I am unsure about the end points. I tried using the ratio test with x = (-1/2) and I get the limit to be 1 so the test fails. What test would I be able to use? Any help is greatly appreciated.
Last edited: