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作者 snew1209 在 PTT [ Math ] 看板的留言(推文), 共75則
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49F推: 請學生說出兩數差距到底是多少09/19 22:28
6F推:推樓上 ( )內是補到無窮項 才能使用無窮級數公式04/10 09:22
2F→:請問鴿籠原理那邊 {1,2,3,4,5} 取到1,3,5的狀況09/03 13:53
10F推:http://math.pro/db/forum-7-1.html 先自己找找08/23 00:37
2F推:推08/15 09:59
8F推:這太強大了 考試時硬做時間就被壓縮了08/01 01:23
9F→:綜合上面老師的提示,令A(a,b),B(a-3,b),C(a-1,b)08/01 01:25
10F→:三角形OAB中,OB線段:0A線段=BC線段:CA線段=2:108/01 01:27
11F→:故OC為角AOB之角平分線,又角AOB=80度,可得角AOC=40度08/01 01:28
12F→:即為所求,就算要求OC線段也不是難事08/01 01:29
1F推:精彩07/29 17:37
1F推:在X軸正向找一點P(a,0,0),然後利用tan差角公式07/09 21:36
2F→:tan(∠APB)≧1/根號3 => 4根號3≦a≦10根號307/09 21:38
3F→:接著旋轉一下P(由X正向轉到Y正向)圖形就出來了07/09 21:39
4F→:當然還要考慮0≦x≦15,0≦y≦15,面積=225-四分之一圓07/09 21:40
5F→:不確定對不對,有錯請指正07/09 21:40
6F→:請問基中有公佈試題嗎 我考的爆爛也想檢討一下卷子07/09 21:42
7F→:第四行錯了 詳見樓下原PO的文07/09 23:18
3F→:請問第一題的高斯符號 第二題的細節07/09 12:44
4F→:該搜尋什麼關鍵字 感謝樓上老師07/09 12:44
7F→:感謝老師 第二題TRML 2007思考賽07/09 16:22
8F→:看了推導以後 決定直接背....07/09 16:22