If ∑anxn\sum a_n x^n∑anxn has radius RRR, what is the radius of convergence of ∑an(x−c)n\sum a_n (x-c)^n∑an(x−c)n?
R+cR+cR+c
R⋅cR \cdot cR⋅c
R−cR-cR−c
RRR