這是排列無重複的公式,排列是對順序有要求,組合則無!
所有跟帖:
• 喔,那就再除以一個 m! -淺水魚- ♀ (0 bytes) () 06/01/2023 postreply 17:58:20
• 喔,那就再除以一個 m! -淺水魚- ♀ (0 bytes) () 06/01/2023 postreply 17:58:20
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