If f(x)=∑n=0∞cnxnf(x) = \sum_{n=0}^{\infty} c_n x^nf(x)=∑n=0∞cnxn has a radius of convergence R=5R=5R=5, what is the radius of convergence for f(x2)f(x^2)f(x2)?
R=5R = 5R=5
R=5R = \sqrt{5}R=5
R=25R = 25R=25
R=10R = 10R=10