作者查詢 / oaoa0123
作者 oaoa0123 在 PTT [ Math ] 看板的留言(推文), 共120則
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1F推: 微分的乘法公式(萊布尼茲法則)用在偏微分上; 是11/23 02:01
5F推: 讓p=(y-7)/(x-y+7)是一群直線,要使p值極化,直線應11/22 22:56
6F→: 切於圓上,切線斜率應為-x/y11/22 22:58
7F→: 打錯,p=(y-4)/(x-y+7)11/22 23:06
11F→: 此直線家族可以展開後係數會與p有關,對於一條相割11/23 00:31
12F→: 於圓的某直線來說,可以讓其平移以極化截距關於p的11/23 00:32
13F→: 函數,所以當p極化時直線必切於圓11/23 00:32
20F→: 恩,不是平移。總之當是割線時他的截距就有再極化的11/23 00:57
21F→: 可能11/23 00:57
1F推: 圓冪定理可以知道剩下一個邊11/22 23:15
6F推: 你只要能算出線性獨立的兩個解當然就可以說他是這個11/03 08:48
7F→: 2nd order ODE 的通解11/03 08:49
8F→: (linear)11/03 08:49
1F推: 有45個方程式和30個未知數,可以10/23 12:30
4F推: 已回文10/21 14:31
16F推: 不覺得會有跟不上的問題+105/09 16:02
3F→: 原PO只是洗文章而已05/03 17:04
3F→: 允許高中作法的話,以G為原點架座標,04/24 11:48
4F→: 令FIJH邊長為a,ABCD邊長為b,則A(-b-3.5,b),04/24 11:50
5F→: E(-3.5,3.5),J(a,3.5-a)三點共線,化簡可得04/24 11:51
6F→: a-b+3.5=0。所求面積是向量GA和向量GJ的行列式值04/24 11:51
7F→: =-3.5(a-b)+3.5^2=2*3.5^2=49/2。04/24 11:52