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作者 walkwall 在 PTT [ Math ] 看板的留言(推文), 共500則

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[中學] 反函數

[ Math ]5 留言, 推噓總分: +3

作者: yourfriend - 發表於 2012/12/18 11:21(11年前)

3^F推walkwall:XDDD 為什麼是高雄12/18 12:38

[中學] 機率(100年武陵段考)

[ Math ]3 留言, 推噓總分: +2

作者: justin0602 - 發表於 2012/12/17 17:51(11年前)

2^F推walkwall:XD 機率應該不高吧12/17 19:43

3^F推walkwall:我算是3/55 比答案更低12/17 20:16

[中學] 幾何證明

[ Math ]2 留言, 推噓總分: +1

作者: ccccc7784 - 發表於 2012/12/17 16:51(11年前)

1^F推walkwall:角CAE=角DBA 因為都跟角BAD合起來九十度12/17 16:56

Fw: [問題] 人都會死嗎?

[ Math ]26 留言, 推噓總分: +9

作者: chronodl - 發表於 2012/12/17 16:42(11年前)

1^F推walkwall:續前推文現實中大部分K與K+1的狀況無法類比故不12/17 16:48

2^F→walkwall:能使用數學歸納法純數學本身的限制即在此12/17 16:49

3^F→walkwall:後面想繼續深究的話可往哲學或者模糊數學方面研究12/17 16:50

5^F→walkwall:如果要從禿頭定義下手那就是走模糊數學的部分12/17 17:02

6^F→walkwall:禿頭本身不是一個01集合而是一個模糊集12/17 17:03

14^F→walkwall:所以說模糊數學的說法就是這個人是0.5禿那個人是12/17 20:32

15^F→walkwall:0.95禿不是說主有禿或不禿兩種12/17 20:33

18^F推walkwall:)12/17 20:48

[代數] 請教一題對數比大小?

[ Math ]3 留言, 推噓總分: +1

作者: rfvbgtsport - 發表於 2012/12/17 16:09(11年前)

1^F推walkwall:log(30,50) = log50/log30 = (1+log5)/(1+log3) <12/17 16:20

2^F→walkwall:log5/log3 < (log5-1)/(log3-1) = log(0.3,0.5)12/17 16:21

3^F→walkwall:後半部是負的要再想一下可能不對12/17 16:23

[其他] 數學歸納法是歸納法還是演繹法

[ Math ]6 留言, 推噓總分: +3

作者: chronodl - 發表於 2012/12/17 14:32(11年前)

2^F推walkwall:從事物中找到共同點為歸納從已知公理推演為演譯12/17 15:54

3^F→walkwall:你要推得這個證明本身是演譯的動作之所以稱做數學12/17 15:56

4^F→walkwall:歸納法則是因為它使用了自然數中K與K+1這個關係的共12/17 15:57

5^F→walkwall:同點12/17 15:57

[中學] 數學問題

[ Math ]16 留言, 推噓總分: +4

作者: abbybao - 發表於 2012/11/29 15:14(11年前)

3^F推walkwall:1.上一步不就說全等了所以對應邊一樣長阿?11/29 15:21

[其他] 關於一題離散

[ Math ]2 留言, 推噓總分: +1

作者: blake31113 - 發表於 2012/10/30 02:04(11年前)

1^F推walkwall:Merge平均不也是 NlogN 嗎?10/30 07:17

[離散] 一題圖論

[ Math ]6 留言, 推噓總分: +3

作者: recorriendo - 發表於 2012/10/28 08:32(11年前)

1^F推walkwall:直覺應該是(mn-m-n)/2+110/28 09:00

[機統] 獨立的觀念

[ Math ]7 留言, 推噓總分: +1

作者: gjynh - 發表於 2012/10/24 11:03(11年前)

1^F推walkwall:因為2的比較是函數本身等於1的條件410/24 11:12

2^F→walkwall:而條件1,2,3 則由此函數分別固定x3 x1 x2 可得10/24 11:13

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