The series converges absolutely for all $x \in [-1, 1]$ and the radius of convergence is $R = 1$.

The series converges conditionally at $x = 1$, diverges at $x = -1$, and has radius of convergence $R = 1$.

The series converges absolutely on $[-1, 1)$ and has radius of convergence $R = 1$.

The series converges conditionally at both endpoints and has radius of convergence $R = \infty$.