Which formula defines the sequence f(1) = 2, ƒ (2) = 6, f(3) = 10, ƒ (4) = 14, ƒ (5) = 18?
OA) f(1) = 2, ƒ(n) = 6 + ƒ (n − 1) for n ≥ 2
O B) f(1) = 2,
ƒ(n) = 4+ ƒ(n − 1) for n ≥ 2
O c) f(1) = 2,
ƒ (n) = 2 + ƒ (n − 1) for n ≥ 2
OD) f(1) = 6, f(n) = 4+ f(n − 1) for n > 2