作者查詢 / wxtab019
作者 wxtab019 在 PTT [ Math ] 看板的留言(推文), 共281則
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3F→: 積的東西不一樣阿 你要改dx ds也是可以 前面也要改07/14 21:44
4F→: 本來還看成m^3+n^3...算完才發現不對07/12 17:52
5F→: 不過算法差不多 m+n=2先移項-> m=2-n07/12 17:52
6F→: 同樣上次方 3^m=3^(2-n) -> 3^m+3^n=3^(2-n)+3^n07/12 17:53
7F→: 所以等於求3^(2-n)+3^n, 0≦n≦2 的最大值07/12 17:53
8F→: 然後看你要直接化成 9*3^(-n)+3^n 去說還是怎樣吧07/12 17:53
3F→: 配方法化成完全平方吧06/25 22:33
1F→: DEC正三角形 EF=FC06/21 15:09
1F→: 至少有兩間 還是恰好只有兩間?06/13 23:08
2F→: 恰好的話就扣掉重複的兩間+其他8間 90選8間而已06/13 23:09
3F→: 至少的話 用+-排除法算吧06/13 23:10
1F→: 畫的線沒錯阿 算出A1 A2長是多少=A3A4=A5A6=A7A806/13 19:11
2F→: 應該也不用 算出A1A6就好06/13 19:12
3F→: 好像也都可以 反正看5個矩形+4弧形 或是4弧+幾個三06/13 19:13
7F→: 看上面發現說錯 是4扇型06/13 19:47
1F→: 遮罩大小不是應該跟圖片大小一樣? 這樣效果不高吧06/12 07:28
1F→: 順序如果是照ABCD順/逆時針的話的確不可能06/02 14:46
2F→: 你自己畫出來就行 中間連線的三角形都不存在了06/02 14:46
3F→: 你看ABC三角形 或BCD三角形06/02 14:47
4F→: 不過這樣看起來也不用照順序也都一樣06/02 14:48
3F→: 直接用圓的方程式帶進去 解二元二次也可以06/02 14:43