If the sequence {an} satisfies Sn = 3A (n + 1) + 2, n ∈ n *, A1 = 1, then the general term formula of sequence an is? (n + 1) is the subscript When n ≥ 2, an = s (n) - S (n-1) = 3A (n + 1) + 2 - 3an-2 4An=3A(n+1) A(n+1) / An = 4/3 {an} is the common ratio q = 4 / 3 =?

If the sequence {an} satisfies Sn = 3A (n + 1) + 2, n ∈ n *, A1 = 1, then the general term formula of sequence an is? (n + 1) is the subscript When n ≥ 2, an = s (n) - S (n-1) = 3A (n + 1) + 2 - 3an-2 4An=3A(n+1) A(n+1) / An = 4/3 {an} is the common ratio q = 4 / 3 =?

S (n) = 3A (n + 1) + 2S (n + 1) = 3A (n + 1 + 1) + 2: a (n + 1) = 3A (n + 2) - 3A (n + 1), that is: a (n + 2) = 4 / 3, a (n + 1) is equivalent to: a (n + 1) = 4 / 3, a (n) because a (1) = 1, a (2) = 4 / 3, a (3) = (4 / 3) ^ 2, so the N-1 power of a (n) = (4 / 3) ^ (n-1) 4 / 3