作者查詢 / OppOops
作者 OppOops 在 PTT 全部看板的留言(推文), 共2411則
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33F推: +1 每天必聽12/19 22:34
31F推: 帥 真男人12/15 23:10
1F→: (1) 直:直角 (2) 正:多邊形邊長相等 (3)斜:不垂直12/06 19:07
2F→: 直圓錐: 底高斜邊, 為兩個90度角的三角形12/06 19:09
3F→: 當然畫不出來 所以不用定義12/06 19:09
1F→: 第三步到第四步, 分子分母要同乘δ嗎?12/05 23:59
2F→: 考慮700張相異抽獎券,抽取70張,全部組合為C(700,70)12/05 16:15
3F→: (1)給定x, P(x抽中) = 1 - C(699,70)/C(700,70)12/05 16:17
4F→: (2)給定x1,x2,x3,x4, P = 1 - C(696,70)/C(700,70)12/05 16:19
5F→: 正面算法,用上面的算式,和巴斯卡三角形恆等式可互換12/05 16:23
4F→: 積分零到無窮sin x/x = pi/212/05 14:47
5F→: 所以 http://tinyurl.com/j6mtkhm12/05 14:48
5F→: 有用到"P(i), i < k + 1"的條件12/05 13:41
6F→: 不過如果這邊把歸納法順序倒過來寫, 跟反證法就一樣12/05 13:43
7F→: 反證法用到p,q∈N, √2 = p/q, 這樣的p,q不存在12/05 13:45
8F→: 看的就是整個正整數集合, 所以用歸納法就是遍歷N給12/05 13:47
9F→: 你看這樣的描述方法.12/05 13:47
68F推: 太神啦12/04 00:24
9F→: 樓上你可以看一樓的答案,再想想這樣討論的問題在哪12/04 00:49
2F→: 把y = 2^x, y = 2^(-x)分別畫出來, 或者12/02 16:19
3F→: 畫直線算交點12/02 16:20
6F推: 描點作圖, 直線只是個參考, 至少 2^x, x<0會漸進y軸12/02 19:03
7F→: 描完以上兩圖的點, 再把高度相加、相減即為所求12/02 19:05