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562009744753067
2 năm trước
cho mình hỏi í 2 bài I và í 1 bài II với ạ cần gấp ạ!!!!!! I.2.cho hàm số y=(m-1)x²-2mx +m +2 . Tìm m để hàm số nghịch biến trên khoảng (-∞;2) II.1. giải hệ phương trình (trong hình ảnh)
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