作者查詢 / LPH66
作者 LPH66 在 PTT 全部看板的留言(推文), 共31384則
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4F推: 合併通分後分子分母全部展開化簡02/08 01:03
1F推: 拿去 Google 以圖搜圖之後他給了個關鍵字: 三平棋/針平棋02/06 18:59
1F推: 看起來有點不太確定狀況如何所以問一下好了:02/04 21:03
2F→: 你有沒有誤將相乘的兩個變數黏在一起寫?02/04 21:04
5F推: 可以向該人提問: 一半加一半怎麼算?02/03 22:52
8F推: 指數形不定形的定式: 取自然對數後再取自然指數02/03 19:21
9F→: 變成 exp(ln(A^B)) 之後, 把 B 拿下來放 ln 前02/03 19:22
10F→: 再把自然指數拿去極限外面, 變成 exp(lim(B*lnA))02/03 19:22
11F→: 裡面的 B*lnA 就能試著湊成分數形套羅必達了02/03 19:23
1F推: load laod 確定有寫對嗎?02/01 21:23
3F推: 一個類似的例子是這題的指數那一團 (x-1)^3+101/30 23:40
4F→: 一直遞增沒錯但在反曲點有平一下下01/30 23:40
5F→: 類似的狀態而已01/30 23:41
2F推: 我會覺得你這個前後端都要做, 前端做為正好 5 分鐘的介面01/28 23:31
3F→: 後端 PHP 則檢查是否時間正確01/28 23:31
4F→: 不過網路延遲這個無解, 你只能容許某個程度的誤差01/28 23:32
5F→: (例如容許超過半秒到一秒等)01/28 23:32
1F推: x^2+y^2=1 不只有中間那塊方形, 還上下延伸喔01/20 18:39
2F→: z 的值沒有限制所以是蓋滿整條 z 軸01/20 18:40
3F推: 畫在原圖上像這樣 https://i.imgur.com/4CoK0Pk.jpg01/20 18:56
4F→: 這個紅色柱體上下延伸才是 x^2+y^2=101/20 18:56
5F→: 所以你的 a 部份也是包在這裡面的01/20 18:57
1F推: 你在 a 小題有做過把 x^2 代換掉的操作對吧?01/18 14:47
2F→: b 小題類似, 要代換掉的東西是 ln x 而已01/18 14:47