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nhiianh0305
2 năm trước
Bài 1: Trong htđ Oxy cho đường thẳng d : 3x-y+4 = 0 và đường thẳng denta : x+2y-5=0 . Điểm A ( -2; 3). 1) Hãy tìm tọa độ điểm H là hình chiếu của A trên d. 2) tìm tọa độ A’ là điểm đối xứng với A qua d. 3) Viết phương trình đường thẳng đối xứng với đường thẳng d qua đường thẳng denta 4) Viết phuong trình đường thẳng đôi xứng với d qua A ( 3 dạng PT). 5) Tìm tọa độ điểm N trên d sao cho ON nhỏ nhất. P/S : GIÚP MK VS Ạ. MK CẦN LẮM Ạ. GIẢI CHI TIẾT GIÚP MK VS Ạ. THANKS NHÌU NHÌU Ạ
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