Which of the following is a power series representation of f (ac) = 16 + 2 2 for all x E (-4, 4). of ( x) = [ 2 2n n=0 of ( I ) = .2n 16 n=0 00 Of (a) = (-1)n 2 2n+2 167 n=0 Of (2 ) = 2n+1 n=0 167+1 Of (ac ) = n=0 16n+1