Hello, I need to check my answer:
The problem asks me to find the radius of convergence for:
(-1)^n * x^(2n+1)
I preform the ratio test, use bn+1/bn...replace alln with n+1...times by reciprocal, etc...the typical method and get:
Taking the limit, the answer = 0....thus the radius is then INFINTE.
So the radius is Infinity. If we were asked, then the int of convergence is (-inf, inf).
Is my answer right?