Determine the radius of convergence for the power series ∑n=1∞x2nn\sum_{n=1}^{\infty} \frac{x^{2n}}{n}∑n=1∞nx2n.
R=1R = 1R=1
R=2R = \sqrt{2}R=2
R=2R = 2R=2
R=∞R = \inftyR=∞