[討論] 排列組合
我正在寫排列組合的題目Orz 發現自己過沒幾題就要看詳解
題目一有變化我就不會了 常常不知道到底題目在問什麼
有沒有強者能提供一點解題的技巧orz 這個章節實在是我數學唯一短路的地方
喔喔還有重複組合跟重複排列我也會搞混 T_T"
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