作者查詢 / kittor
作者 kittor 在 PTT [ Math ] 看板的留言(推文), 共324則
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4F→:region06/24 12:15
2F→:請問第八題求出的-50該怎麼解釋05/29 08:57
4F→:就是物理上來看,物質的組成百分比不可能是負值05/29 12:46
2F→:1/24?04/28 17:49
3F→:定積分的話沒有給條件?04/28 17:54
1F→:題目給的函數式應該是力的函數,怎麼直接對時間微分y04/18 08:40
2F→:了,而且題目只給兩個端點,沒有說積分路徑,這是線04/18 08:40
3F→:積分的題目吧04/18 08:41
5F→:嗯,我理解錯題意了04/18 12:40
3F推:積y的範圍是3-3x到004/17 08:40
5F→:也可以寫成xi+x^2j,以t的寫法和x的寫法差異在於,以03/12 08:13
6F→:時間描述位置和以x軸位置描述位置03/12 08:14
2F→:算式中的5%是應該要和每年的存款數去計算的01/30 16:51
12F→:dM/dt=3000+0.05M, M(0)=5000?01/31 19:36
14F推:3000是存戶每年存的金額,0.05M是銀行依存戶的存款計02/01 09:39
15F→:5%而給的錢,這兩者的效應加起來影響存戶存款的數字02/01 09:40
16F→:變化率02/01 09:40
6F→:安培右手定則01/17 23:03
5F→:z隨x、y變動,所以只需要兩個向量01/16 08:31