作者查詢 / BePi
作者 BePi 在 PTT [ Math ] 看板的留言(推文), 共27則
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2F推: 讚喔!07/10 21:33
2F推:加這個條件就可以算了 b+c=9-a代入所求 配方11/25 01:01
3F→:可得a=4or5 有Max=20 但是a=5帶回去原本log那邊 求11/25 01:01
4F→:不出整數的b c 所以不合11/25 01:02
5F→:a=4可以解出 b=2 c=311/25 01:02
12F推:(3,2,4) => ab+ac=18<20 是說 似乎目標函數打錯11/25 01:37
7F推:Yes11/25 01:57
1F推:12題 a9 跟a10 一定一正一負01/27 21:23
2F→:用這個概念去推測b是公差負的數列01/27 21:24
3F→:大概就找得到答案了01/27 21:24
17F推:http://mag.udn.com/html/campus/e102/e102_02a.pdf01/27 21:49
20F推:有沒有可能是b9正 b10負?01/27 22:00
27F推:等比 首項,公比不能是001/27 23:34
5F推:太神了!!!11/19 15:42
7F推:學生問的時候我也超想用Lagrange的11/19 16:25
1F推:謝謝 這方法比我疊合的方法好多了05/30 13:31
3F→:第二題我弄出來了05/29 16:04
4F→:第一題我也是用海龍=rs 想問有沒有其他方法05/29 16:04
5F→:第二題用圓參數式加疊合 弄了兩輪疊合搞出來了05/29 16:08
1F→:我有爬文過 上面的文都沒結果11/05 00:53
1F→:2.討論極值所在的點 畫圖判斷03/27 19:08