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作者 algebraic 在 PTT [ Math ] 看板的留言(推文), 共123則
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4F推: 連bq線段 證明角abq為45度06/12 22:20
5F→: 證明方式為利用 ap=bp=qp06/12 22:21
1F推:06/08 15:42
7F→: 你這樣算期望值才2塊錢 我才不要玩05/31 20:16
1F推:05/31 13:03
2F→: 第一題 由A^3=O可知 A的特徵值為005/31 00:08
3F→: 所以簡單計算可知 A^2=(A的對角線和)*A05/31 00:09
4F→: 後面就能很容易得到了05/31 00:09
1F推: wiki 查 等價關係(equivalence relation)05/30 02:19
2F→: 或許對你有幫助?05/30 02:19
6F→: 這就只是(x-p)(x-q)(x-r)(x-s)的展開與比較係數阿05/28 20:11
7F→: 你要n次多項式 就是(x-a_1)...(x-a_n)的展開05/28 20:11
8F→: 然後比較細數05/28 20:12
10F推: 把原式寫成 (1-y)x^2+(y^2)x-y^2=0 這題就剛好能用05/19 11:52
11F→: 十字交乘解開05/19 11:52
5F→: 原來這個版也會有廢文… 好想給噓05/19 11:45
1F→: 一元二次方程式的公式解永久有效05/18 02:12