Given f(x)=∑n=0∞cnxnf(x) = \sum_{n=0}^{\infty} c_n x^nf(x)=∑n=0∞cnxn with R=3R=3R=3, find the radius of convergence of f(x3)f(x^3)f(x3).
R=3R=3R=3
R=33R=\sqrt[3]{3}R=33
R=9R=9R=9
R=1R=1R=1