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chakrakaton
2 năm trước
Lập ptts và pttq của các đường thẳng (d) a) (d) qua M(2;1) với vectơ chỉ phương là a=(2;4) b) (d) qua M(-2;3) với vectơ pháp tuyến là b= (5;1) C) (d) qua M(2;4) và hệ số gốc K=2 d) (d) qua M(5;3) và B(1;6)
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