作者查詢 / jetzake
作者 jetzake 在 PTT [ Math ] 看板的留言(推文), 共525則
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5F推:第一行是a ax ax^2 加上b by by^2 ....這樣推??08/03 02:42
6F推:類似克拉瑪公式 把x和y的次方全當作常數??08/03 02:50
7F→:雖然直接全寫出來爆破也是可以 但能想到也是很神...08/03 02:55
29F推:"點沒有長度、線沒有面積 而平面也不會有體積這回事"08/02 23:38
30F→:如果沒有這些基本定義 後續的討論只會是鬼打牆08/02 23:38
32F→:另外 精準的做圖有其必要性 這也是這樣下定義的理由08/02 23:41
33F→:如果要說"2就定義成「1的後一個數」"也不是不行08/02 23:42
34F→:先定義出自然數系 然後把"+1"當成"往後移動一個數"08/02 23:43
35F→:這也是一種很常見的作法 而且不影響討論08/02 23:43
37F→:所以這樣的作法下 直接說"1+1定義為2"並無不妥啦08/02 23:44
38F→:至於所謂"後一個數" 直接引數線來討論也不麻煩不是??08/02 23:46
41F→:"定義出自然數系"不就有所謂"次序關係"了??08/02 23:58
42F→:這種作法 其實就是把麻煩丟到"定義自然數"這件事上08/02 23:59
43F→:其實吼.. 尤其是討論數學 主觀直覺的東西不能全不要08/03 00:00
44F→:像本版第一篇那樣引入集合來玩 才顯得更難以理解吧??08/03 00:01
46F推:所謂"長度1"其實是"定義"來的 也就是"說了就算"08/03 00:08
47F→:並沒有所謂找不找的問題啦....08/03 00:09
50F→:要叫人家"不懂就閉嘴"這也太過.....08/03 00:58
52F→:只能談"自己懂的事" 也有違本版的目的吧??08/03 00:59
33F推:嘛... 為什麼沒人告訴原PO"0和1都是說了就算 不用找"08/02 04:43
61F推:...你先把"座標"和"數量"兩種觀念分開可以嗎???08/02 04:34
46F推:他只是在"無限個a的次方數中 找出兩個相等的"07/29 05:42
47F→:後續甚至可以證明a的某次方必會和自身相等這樣07/29 05:43
1F→:這種說法也太苛了.. 小時候解一元二次方程式也是這樣07/23 00:48
2F→:如果一切回到定義 直接說個"複數不討論"還比較快07/23 00:52
3F→:就像一元二次式無解和無實數解在國中當做同一件事07/23 00:53
10F推:如果習慣看圖抓比例面積的話 其實好像還好???07/12 21:40
11F→:我這也算了一遍 答案也不一樣就是 = =A07/12 21:40
4F推:α和β是ω和ω^2??07/12 19:51
5F推:(30-3)^2 (300-33)^2 (3000-333)^2一直下去嗎??05/19 09:22