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作者 Vulpix 在 PTT [ Math ] 看板的留言(推文), 共7171則
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6F推: 所以零向量空間的基底只能有0個向量。02/21 11:14
9F→: 3.2和11,這樣行列式值就都是8。爛題目隨便給個解02/19 14:37
10F→: 好。02/19 14:37
1F→: 有,用和差化積算一下就夠了。02/11 00:26
1F→: 15/7,把圓心和切點的連線畫一畫,所有長度用半徑表02/06 18:17
2F→: 示,列方程就可以解出來了。02/06 18:17
2F→: 2階線性遞迴數列02/04 18:17
4F→: 收斂半徑≦6,-8那兒真的不發散?02/03 18:22
5F→: 還是說題目在"Σ沒寫範圍"挖陷阱,可能從-∞開始加?02/03 18:24
8F→: 這種題目,如果AB對角化後不是kI⊕0,應該就沒有02/04 21:54
9F→: 一個固定的答案(就是會有無限多解)。02/04 21:55
1F→: a的答案:否。試試看交錯級數。02/02 17:13
4F推: a_n=b_n=(-1)^n/sqrt(n)這個就是很經典的了。02/02 17:29
11F→: 有限項怎麼加都還是一個普通的數字02/02 17:59
2F→: 一定是鏈鎖律。d=2r所以dd=2dr。01/26 17:09
11F→: 直徑增量不是厚度,半徑增量才是厚度。01/27 00:14
21F→: 你再想想從體積算表面積為什麼可以用微算。01/27 18:07
22F→: 微分01/27 18:08
28F→: 給樓上,積分下限是0,積分上限是d,要改的是被積函01/28 01:09
29F→: 數:(πD^2)/2。01/28 01:11
2F→: codim是給subman.用的,應該是relative dimension。01/23 18:56