陰関数の微分を使うのでは？計算してないけど
https://examist.jp/mathematics/derivation/inkansuu-bibunhou/
そうです
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陰関数の微分を使うのでは？計算してないけど
https://examist.jp/mathematics/derivation/inkansuu-bibunhou/
そうです
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aを定数として両辺xで微分すればいいのでしょうか？