作者查詢 / zjes40604
作者 zjes40604 在 PTT [ Math ] 看板的留言(推文), 共39則
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1F推: 69題只想得到用列舉的 三個數相同、兩個數相同跟06/22 15:40
2F→: 各不相同 再去判斷是否為3的倍數06/22 15:40
3F→: 70題 設牆面有n塊磚 則(n/9+n/10-10)x5=n 解出來06/22 15:41
4F→: 就是90006/22 15:41
2F推: 在整個實數系內 對於任意數x,皆可設a=1,b=(1/x)05/18 17:09
4F推: a/b在整個實數系內05/18 20:14
1F推: 阿...題目是要證明什麼 怎麼沒有一個等號之類的04/10 21:34
2F推: 題目不是不一樣嗎 一個趨近無窮 另一個趨近零06/16 07:17
1F推: 再積後面的兩個都少負號了吧01/16 15:41
1F推: 正三角形01/12 10:25
1F推: 第一題:u(0,t)=1=w(0,t)+101/07 21:18
2F推: 整個pde會變成w對x,t的方程式01/07 21:21
3F推: 第二題u(0,y)=u(1,y)=0. X(x)就是sin nπx01/07 21:23
4F→: 再用另外兩個邊界條件應該就能解了01/07 21:24