Tangent normally has vertical asymptotes at -π/2 (on the negative side) and π/2 (on the positive side). What are the θ values nearest to the y-axis where y = tan 3θ has vertical asymptotes?

Someone answer this asap for the first five terms of a sequence are shown. 5, 11, 23, 47, 95, . . which recursive function defines the nth term in the sequence for n > 1? a. f(n) = f(n - 1) + 6 b) f(n) = f(n - 1) + 48 c) f(n) = 3 • f(n - 1) + 1 d) f(n) = 3 • f(n - 1) - 4