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Senior High 全学年
字有點醜，但希望各位會喜歡😀😀
このノートに関連する質問
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高三選修數乙習作 求第二題 第五題的（3）（4）小題 以及第七題 只解其中ㄧ兩題也可以😭非常感謝！
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請問sin30要怎麼算
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請問這兩題該如何計算。謝謝
Senior High
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想請問這兩題如何解！謝謝！
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這三題的答案都一樣為9/8 請問為什麼這三種抽法的期望值都是直接乘上抽一次的期望值？ 為什麼期望值不會因為取後不放回而影響第二次抽的期望值，因為我想說某球色被抽走後，下次抽的時候，該球色被抽出的機率就會改變，這樣就會影響到期望值，像是刮刮樂，為什麼先抽後抽的期望值都一樣，不會因為大獎被抽走了而影響之後抽出的期望值嗎？ 換個問法是，為什麼每一次抽都可以視為獨立的事件，期望值有沒有什麼特性之類的？ 我現在對期望值的理解是：預測多次抽取的的平均值，為假想的 但是對於這個概念真的難以理解，因為前面學的排列組合，算出來的值是實際的，但這邊偏向假想出來的，導致我在這個單元卡的比前面排列組合多很多 希望可以幫忙解釋這個概念 感激不盡
Senior High
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看不懂它的原理是什麼，求解🙏
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看不懂，求教學🙏
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想請教這題怎麼解？
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求解🙏
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不是說左極限=右極限存在且相等時，x →某值的極限才存在 那為什麼像是這種都不用去討論他的左右極限，就知道他們相等呢？ 而只要把0帶入判斷正負拆絕對值？ 謝謝～
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