What is the radius of convergence for ∑n=0∞xnn2+1\sum_{n=0}^{\infty} \frac{x^n}{n^2+1}∑n=0∞n2+1xn?
R=0R=0R=0
R=1R=1R=1
R=2R=2R=2
R=∞R=\inftyR=∞