最終更新日：2025/11/24
Without loss of generality, assume x ≤ y so that we can prove the inequality for this ordering and then extend it to all cases by symmetry.
正解を見る
Without loss of generality, assume x ≤ y so that we can prove the inequality for this ordering and then extend it to all cases by symmetry.
音声機能が動作しない場合はこちらをご確認ください
編集履歴（0）
