6. e) (a . b)d n) (axb) . a g) (a - b) . c Thinking/Inquiry (13 marks) 7. Let a = (2, -2, 3), b = (1, 3, 4), and c = (3, 6, 4). Find: (6 marks) a) (a x b ) x c b ) ( axb ) . a 8. Consider the vectors u = (2, -1, 1) and v = (1, 1, 2). Determine the angle 0 between u and v. (3 marks) 9. Show that the vector a = (5, 9, 14) can be written as a linear combination of the vectors b and c, where b = (-2, 3, 1) and c = (3, 1, 4). (4 marks)