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Vectors and matrices — Question 5

QCAA 2023, Paper 2 · 1 mark

Q5 · 2023 · Technology-activeSimple familiar1 mark

QUESTION 5

A plane contains the origin and the points (1,2,3)(1,2,3) and (3,2,1)(3,2,1). A vector normal to the plane is
(A)
(4−84)\begin{pmatrix}4\\-8\\4\end{pmatrix}
(B)
(4−8−4)\begin{pmatrix}4\\-8\\-4\end{pmatrix}
(C)
(−4−8−4)\begin{pmatrix}-4\\-8\\-4\end{pmatrix}
(D)
(−4−84)\begin{pmatrix}-4\\-8\\4\end{pmatrix}
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