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作者 Vulpix 在 PTT [ Math ] 看板的留言(推文), 共7170則
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3F推: 照定義算。01/14 23:16
12F推: (E[(X-μ)^4]-σ^4)/n + 2σ^4/n(n-1)01/15 11:47
7F推: 交流電在RC電路上的阻抗。的確抄錯不少東西。總之01/13 22:22
8F→: 用樓上的提示去處理吧,只是複數的實數化(和反變化01/13 22:22
9F→: )而已。01/13 22:22
5F推: 1應該改成線段,直線有點怪。然後12都是凹性的等價01/13 00:48
6F→: 定義。01/13 00:48
8F推: 另外,3可以。01/13 15:03
13F推: 每個機器、每個程式用的算法不一樣。01/12 21:19
1F推: https://i.imgur.com/EXt15F0.jpg 大概是這樣吧?01/12 05:35
2F→: 先旋轉,然後DFF'A'是平行四邊形,所以兩角各是等腰01/12 05:38
3F→: 三角形CDA'的底角的同位角。01/12 05:38
3F推: △DEF的周長剛好是CD。跟樓上作法類似,不過可以從01/11 22:23
4F→: 圖上直接看關係。△ABF的周長剛好是2BC。01/11 22:24
5F→: *△DEG的周長剛好是CD。01/11 22:25
27F推: 我記得分完的球都沒有 measure。01/11 02:26
1F推: 這個啊,世一有一套數學反覆計算練習。應用應該不01/09 17:28
2F→: 用寫。01/09 17:28
3F→: 或者自己出卷考自己,數字隨便寫,答案就用電腦或01/09 17:33
4F→: 計算機來算。容易加錯的話,可以考慮背九九加法表01/09 17:33
5F→: 。倍數則是作為驗算手段很省時。01/09 17:33