3. Let P(0, -2,0), Q(4, 1,-2) and R(5, 3, 1) be the points which lie on a plane. (a) Find a non-zero vector orthogonal t
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3. Let P(0, -2,0), Q(4, 1,-2) and R(5, 3, 1) be the points which lie on a plane. (a) Find a non-zero vector orthogonal t
3. Let P(0, -2,0), Q(4, 1,-2) and R(5, 3, 1) be the points which lie on a plane. (a) Find a non-zero vector orthogonal to the plane through the points P, Q and R. (b) Find the area of the triangle PQR.
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