If f(x)=∑n=0∞anxnf(x) = \sum_{n=0}^{\infty} a_n x^nf(x)=∑n=0∞anxn has R=2R=2R=2, what is the radius of g(x)=f(3x)g(x) = f(3x)g(x)=f(3x)?
R=6R = 6R=6
R=2/3R = 2/3R=2/3
R=2R = 2R=2
R=5R = 5R=5