推 springman :1a 應該是 f(1) = 0 且 f(n) = 0 的意思吧 05/18 09:26
→ springman :2 是以 000 為開頭或 00 為結尾的bit strings個數 05/18 09:27
1.How many functions are there from the set {1,2,..........,n}，where n is a
positive integer,to the set{0,1}
a) that assign 0 to both 1 and n?
b) that assign 1 to exactly one of the positive integers less than n?
2.How many bit strings of length 10 either begin with three 0s or end with
two 0s?
題目看不太懂
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※ 編輯: yuchiao0921 來自: 114.41.121.19 (05/18 05:29)