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[中學] 求時針與分針的夾角90度與180度

[ Math ]37 留言, 推噓總分: +3

作者: rock810 - 發表於 2015/07/14 16:56(8年前)

3^F→rock810: 可是國中數學，搞到毫秒...老師你...07/14 17:13

14^F→rock810: 所以答案裡面還是有未知數？07/15 08:58

15^F→rock810: 16.36363636363636→除不盡，我無解的意思就是這樣07/15 09:00

16^F→rock810: 因為題型是填充題，老師也沒說請列算式07/15 09:01

17^F→rock810: 如果說只是列算式的話，那我已經解開了07/15 09:03

18^F→rock810: 根據時鐘的類型，這題答案會有不同的結果07/15 09:04

19^F→rock810: 用EXCEL窮舉43200秒其實不會太久，大概10分鐘做完07/15 09:13

20^F→rock810: 12763秒，3:32:43，時針106又43/120度07/15 09:13

21^F→rock810: 分針196又3/10度，相減89又113/120度07/15 09:13

22^F→rock810: 3點的答案在3:32:43～3:32:44之間07/15 09:14

23^F→rock810: wohtp 給的算式，求解是6點16分又4/11秒，形成90度07/15 09:17

24^F→rock810: 嗯，應該是我太執著整數解07/15 09:19

25^F→rock810: 因為我假設的時鐘是每秒跳一格，沒有小數跟分數07/15 09:20

26^F→rock810: 感謝三位大大參與討論07/15 09:22

33^F→rock810: 會在把這題翻出來，是因為看到一篇文章講CT07/16 09:25

34^F→rock810: 就在想如果沒學過一元一次方程式，該怎麼思考07/16 09:25

35^F→rock810: 才會有窮舉出現，加上自己設定時鐘不連續，自婊07/16 09:26

36^F→rock810: CT=computational-thinking07/16 09:28

37^F→rock810: 玩到最後混亂了，還好有上來問07/16 09:28

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