次の性質を満たす数列 {a_n},{b_n} の例を一つ挙げよ.

(1) lim[n→∞] (a_n/b_n) = 1
(2) lim[n→∞] (a_(n+1)/b_n) = 0
(3) lim[n→∞] (a_n/b_(n+1)) = ∞

簡単すぎ?