What is the relationship between the radius of convergence RRR of ∑n=0∞anxn\sum_{n=0}^{\infty} a_n x^n∑n=0∞anxn and ∑n=0∞anx2n\sum_{n=0}^{\infty} a_n x^{2n}∑n=0∞anx2n?
The new radius is R\sqrt{R}R
The new radius is RRR
The new radius is 2R2R2R
The new radius is R2R^2R2