[計量] 幾題計量
1. a certain class is evenly divied into 5 ratings A,B,C,D and E
If the least one of the rating has 6 or more students, what is
the least total number of students in the class?
A.25 B.26 C.30 D.31 E.36
這題答案是B,所以人數是5,5,5,5,6這樣對嗎?
不過題目提到了evenly,所以最小應該還可以比26更小吧?
2. x and y are positive odd integers
colA. (-1)^xy
colB. (-1)^(x+y)/2
這替答案是給D,可是不管怎樣兩個基數加起來再除以2都會是偶數吧?
所以應該是B恆大不是嗎 = =
3.ColA. 11^(1/2) + 17^(1/2)
ColB. 14^(1/2) + 14^(1/2)
我想請問關於這種更號的繁瑣計算
除了慢慢找值代別無他法了嗎?因為我算一下居然要代到小數點第二位= =
4. 我想請問的是昨天有人問到的印網的一題
Given that 1 <= x <= 8 and y <= x, then find the number of possible
coordinates of (x, y)?
昨天有人問的試題目裡有寫orderly
不過我後來想想,在y<=x的情況下,是不是有沒有寫orderly都沒有關係呢?
所以這題的答案應該是45對嗎?
問題有點多,謝謝大家~
--
※ 發信站: 批踢踢實業坊(ptt.cc)
◆ From: 111.252.81.75
推
09/24 14:36, , 1F
09/24 14:36, 1F
→
09/24 14:36, , 2F
09/24 14:36, 2F
→
09/24 14:37, , 3F
09/24 14:37, 3F
→
09/24 14:39, , 4F
09/24 14:39, 4F
→
09/24 14:39, , 5F
09/24 14:39, 5F
→
09/24 15:13, , 6F
09/24 15:13, 6F
→
09/24 15:14, , 7F
09/24 15:14, 7F
→
09/24 15:14, , 8F
09/24 15:14, 8F
推
09/24 15:17, , 9F
09/24 15:17, 9F
→
09/24 15:18, , 10F
09/24 15:18, 10F
→
09/24 15:18, , 11F
09/24 15:18, 11F
→
09/24 15:19, , 12F
09/24 15:19, 12F
→
09/24 15:19, , 13F
09/24 15:19, 13F
→
09/24 15:20, , 14F
09/24 15:20, 14F
→
12/02 19:19, , 15F
12/02 19:19, 15F
→
04/13 23:49,
5年前
, 16F
04/13 23:49, 16F
討論串 (同標題文章)