問題詳情

8. The number of ways to buy n dollars of tickets is represented by an, if only 1-dollar and 2-dollar bills can be used. What of the following can be therecurrence relation for our question? (initial condition: a0 =1；a1 = 1；)
(A)


(B)


(C)


(D)


(E) none of the above.

參考答案

答案：[無官方正解]
難度：計算中-1
書單：沒有書單，新增