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作者 Vulpix 在 PTT [ Math ] 看板的留言(推文), 共7235則
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1F推: 某一色塗兩次,先用他塗。05/19 23:43
2F→: 答案手寫的?你看錯答案了。05/19 23:45
1F推: 首先 dy/dx = 8t^2 應該是你知道的。05/08 22:12
2F→: 然後是兩邊對 x 微分,這樣左邊才是 y 對 x 微分兩05/08 22:12
3F→: 次。這樣一來,右邊就是 d(8t^2)/dx。05/08 22:12
4F→: 然後你可以思考一下 t 要怎麼對 x 微分。05/08 22:12
20F推: 好像也是。大部隊要怎麼教才能學會需要的數學呢?05/08 18:49
4F推: 依據小孩消化能力不同,一小時到三小時的訂正份量05/02 18:37
1F推: 應該是軸。這個方法不錯,不用計算。04/26 05:29
2F→: 差不多可以說是找任意一段圓弧的圓心的方法。04/26 05:33
17F推: 數學老師應該要自己判斷。04/24 20:55
18F→: 如果三階階差算出0,就是拋物線。負的就是雙曲線。04/23 03:25
9F推: 建立坐標系,量五個點的坐標,解曲線方程(逃)04/21 23:52
14F推: https://i.imgur.com/wE33aK8.png04/23 03:06
15F→: 隨便畫一套平行線,四條都有交於兩點就好。04/23 03:07
16F→: 左邊三個數字是E跟上面三條線的距離。04/23 03:07
17F→: https://i.imgur.com/897kex8.png 三階階差>0→橢圓04/23 03:14