Which formula defines the sequence f(1) = 2, f (2) = 6, f(3) = 10, f (4) = 14, f(5) = 18? o
1.f(1) = 2, f(n) = 6 + f(n-1) for n > 2
2.f(1) = 2, f(n) = 4 + f(n-1) for n > 2
3.f(1) = 2, f(n) = 2 + f(n-1) forn > 2
4.f(1) = 6, f(n) = 4+ f(n-1) for n > 2

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