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作者 sheep922420 在 PTT [ Math ] 看板的留言(推文), 共20則
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49F推:0.999... = 109/05 13:07
50F→:在微積分中是要表達 0.999...這個小數點9無窮循環的09/05 13:09
51F→:數 他是往"1"這個實數收斂09/05 13:10
52F→:而不是說0.999...真的等於109/05 13:11
53F→:個人見解,有錯誤麻煩版上大大給予修正~~ 謝謝!!09/05 13:12
58F→:那我寫錯了,0.999...是等於1沒錯...09/05 14:36
59F→:因為0.999...無線循環 本身已經包含無窮的符號了.09/05 14:38
4F→:她真的不是一個函數...XD09/26 21:34
1F推:2 如果X和Y是dependent的話,那應該要先找出09/26 20:11
2F→:X Y 的 joint pdf 吧09/26 20:12
3F→:No 我的意思是, 你要找到09/26 21:24
4F→:f_(X,Y)(x,y) <--- X,Y 兩個r,v 所形成的 joint pdf09/26 21:25
5F→:則可求得 P(X<0,Y<0)09/26 21:27
6F→:P(X<0,Y<0)= ∫∫f_(X,Y)(x,y)dxdy 積分範圍均為09/26 21:30
7F→:-∞到009/26 21:30
8F→:不過機率我不是很熟,比較常處理independent r,v's09/26 21:32
9F→:非independent比較少處理,等待版上其他高手解答09/26 21:33
5F推:http://www.gnu.org/software/octave/08/16 00:49
6F→:模Matlab的軟體,可直接下載不用錢08/16 00:50
7F→:模仿08/16 00:51
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