DETAILS Find the Maclaurin series for f(x) using the definition of a Maclaurin series. [Assume that f has a power series expansion.] f (x) = rear 50-1 O n=1 (n - 1)12 52 n (n+1)!" O n=1 5"'n (n + 1) 2n (2n) ! O n=1 50-1 O 7=1 C(-1)" 57-1 n n+1 O n=1 (n - 1) !" Find the associated radius of convergence, R. R =