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tuquyentran1802
2 năm trước
Cho hàm số y=(m-1). x+2 , đường thăng y=(3-m).x+1. Tìm M để đồ thị song song, Vẽ đồ thị của 2 hàm số trên với m=0 và tìm góc tạo bởi hai đường thẳng với Ox
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