Question: 3 3. Let a= and b= (a) (5 marks) Find a vector of magnitude (a b) in the opposite direction of a x b.

3 3. Let a= and b= (a) (5 marks) Find a vector

3 3. Let a= and b= (a) (5 marks) Find a vector of magnitude (a b) in the opposite direction of a x b. (b) (4 marks) Determine if the plane given by 25y+55 15-20 contains the vectors a and b, and if it contains the point P(1,2,-1).

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