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Câu 25:

Trong mặt phẳng toạ độ $Oxy$

Câu 25: Trong mặt phẳng toạ độ OxyOxyOxy, cho đường thẳng $d:\left\{ \begin{array}{*{35}{l}} x=-2t \\ y=4+t. \\\end{array} \right.$ Trong các vectơ sau, vectơ nào là vectơ pháp tuyến của ddd ?

Thông tin câu hỏi

Câu 25:

Trong mặt phẳng toạ độ $Oxy$ , cho đường thẳng $d:\left\{ \begin{array}{*{35}{l}} x=-2t \\ y=4+t. \\\end{array} \right.$ Trong các vectơ sau, vectơ nào là vectơ pháp tuyến của $d$ ?