作者查詢 / Vulpix
作者 Vulpix 在 PTT [ Math ] 看板的留言(推文), 共7235則
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24F推: 這個就畫輔助線然後比大小。06/06 16:24
1F推: 23/126+23/65+23/44 看起來不會很久。06/04 14:56
3F推: 不過第一題這幾個數字的話,我會直接把小數全寫出來06/04 14:59
4F→: 然後直式加法XD 有玩競賽的話那幾個數字應該可以直06/04 15:00
6F→: 接默寫了吧?06/04 15:00
3F推: 你沒錯,是題目的問題。不過搭配題型來看,答案也05/30 21:53
4F→: 不會到無限多組,一位數的正整數解只有三組。05/30 21:54
1F推: 就真的算一遍吧。05/29 00:00
1F推: 如果從同倫群下手?同倫比較有畫面,而且多少有關。05/27 14:55
1F推: 直接查一般的表示式,不相等。05/26 01:49
22F推: 其實在你遇到的其他函數夠好的時候,確實會一樣。05/26 13:20
23F→: 不過要挑出不同也還是很好挑。你可以分別查wiki。05/26 13:20
1F推: 好像就是四次沒錯,那就用一次因式檢驗法吧。05/21 20:17
2F推: 都不行的話還有公式解。05/21 21:42
1F推: ln(1+x)≒x,有很多手段都能做。不過式子的數字怪怪05/20 15:39
2F→: 的,69/r應該更接近一點。ln2≒0.693。05/20 15:40
4F推: 可是r=10,我去算也應該要用73。r愈小,693就愈準。05/20 19:58