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作者 afflic 在 PTT [ Math ] 看板的留言(推文), 共54則
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1F→:原來小學就會算幾不等式...11/21 10:50
14F推:直接複製貼上11/21 10:39
14F推:會算就好啦11/16 17:02
15F→:什麼年代了還在用手算11/16 17:03
16F→:真的要化到最簡的話次方是不是也應該展開11/16 17:04
18F推:過程比較重要吧? 答案留給電腦算...11/21 10:44
9F推:0種,因為選不到課 orz08/12 05:30
10F→:這種題目真麻煩...08/12 05:31
3F推:應該是因為,E(X|X)=X*P(X|X)=X*1=X06/05 01:33
4F推:我比較好奇後項為什麼是0,太久沒算條件機率了@@06/05 01:35
6F推:獨立跟期望值=0的關係是...?06/05 01:52
8F推:對齁! 想說獨立什麼時候imply期望值=0了06/05 02:33
5F推:既然是出在微方,就是希望你用微方的方法吧10/12 03:42
2F→:就用乘法公式微分之後找臨界點帶回去求極值09/09 21:37
3F→:連續函數的極值臨界點發生在三種狀況:09/09 21:39
4F→:一次微分=0 or 邊界 or 不可微分點09/09 21:39
5F→:這題沒有不可微分點,所以就代邊界值跟微分=0的值09/09 21:40