THPT Math Practice Questions - National High School Graduation Examination - Mathematics (Kỳ Thi Tốt Nghiệp Trung Học Phổ Thông - Môn Toán) Exam

In the plane Oxyz, the plane (P): x − 3y − z + 8 = 0 has which of the following as a normal vector (vectơ pháp tuyến)?

(1; −3; −1) (1; −3; 8) (1; 3; 1) (−1; −3; −1)

Correct Answer:

(1; −3; −1)

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