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作者 Vulpix 在 PTT [ Math ] 看板的留言(推文), 共7235則
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1F→:不是保留f^(-1)(x)就是用三次方程公式解去把07/15 17:46
2F→:f^(-1)(x)解出來。估計應該是保留反函數的符號吧。07/15 17:46
13F→:其實代數基本定理用高中的東西還是可以證明的,07/15 16:39
14F→:只是證明過程對高中數學沒有太多幫助,所以略過。07/15 16:40
3F→:"舉反例"跟"反證法證明"是一樣的意思喔。07/14 14:03
5F→:我其實想要強調"舉反例就是證明",然後是證反面為真07/14 14:21
6F→:這樣...07/14 14:21
5F→:formula跟formulae...07/09 23:54
1F→:你抄的公式是繞x軸旋轉的體積唷...07/09 21:42
11F→:一定啊,因為兩個小數部份相減不會是0.0000......07/08 20:51
13F→:不是的,循環節有「長度」,但循環節長度不是循環節07/08 22:42
14F→:就像我的體重不是「我」一樣07/08 22:43
16F→:不過其實1/13跟10/13的循環節一樣XD07/09 22:04
10F→:28不需要用l'Hospital,所以題目沒問題。07/08 19:17
13F→:其實,General Mathematics就是Calculus。07/05 10:59
1F推:A=2π[0 1;-1 0], B=π[3 13;-1 -3]06/14 18:25
2F→:多出來的維度就「直加」0方陣06/14 18:29
10F→:要討論的話,請考慮x+y,x-y與0的大小關係06/03 12:24
11F→:總共分四次就做完了06/03 12:24