作者查詢 / quark
作者 quark 在 PTT [ tutor ] 看板的留言(推文), 共194則
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62F→: "0的平方根是0"是很常見的敘述 沒什麼不對的09/29 03:44
69F→: 我覺得是你沒弄懂我的意思:)10/01 06:32
38F推: 抽樣不能代表全體 全體擔心率應改為"受測對象"擔心率06/08 02:20
6F推: 用數據分析學的"分組資料標準差"推回來 再用實例算一次05/20 05:32
9F推: 經典難題 我看過11種解法 大多需要作輔助線 需"創造力"05/07 03:29
11F推: 當然不成立 x^2 =1 => x= ±1 是兩個都成立05/05 02:56
12F→: |x|= ±x 必定有一個不合(0除外)05/05 02:56
8F推: 推倒數五、六兩行 真的講得很好 要學習創造生命的價值05/05 03:08
14F→: 第一個作法你少一個負號 sin(2070度)是負的 要加負號08/19 01:20
2F推:推認真文05/09 02:16
12F推:國中的話 可以設x+y=k 代入得x^2-kx+100=0 再用判別式≧003/10 08:16