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phamthihuongthptlynhantong
2 năm trước
Cho đg thẳng có pt : ax + ( 2a-1)y+3 =0 .Tìm a để đg thẳng d đi qua điểm M (1 , -1). Khi đó tìm hệ số góc của đg thẳng d
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