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数研出版「数学Ⅰ」の教科書を参考に作成
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4の途中式と答えを教えてください。 (1)(2)両方です！
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マーカーの部分が分かりません なぜ変形しないといけないのかどうやってこの形になったのか教えてください🙇♀️
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分散の最後の矢印の部分がわかりません。至急解説おねがいします。
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教えられる範囲で構いませんので教えて頂きたいです！
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上から4行目はなぜこうなるのですか？
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この問題が分からなくて回答を見ながらやっていたのですが、（2枚目画像参照）なぜ、AUB＝Uのとき最小なのでしょうか？？ よければこの問題の解説もお願いします
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この時の等号が成り立つ時ってなんですか？
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写真の解説下から2行目の、重心のx座標を17/6にする途中の計算を教えてください!!🙇 前できたんですけど忘れちゃって（汗）
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途中式お願いします🙇🏻♀️⸒⸒
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復習（１）の練習２の問題文は
「次の整式をxについての降べきの順に整理し、各項の係数、定数項を、求めよ。」
です。