Question: Vector A extends from the origin to (1, 2, 3), and vector B extends from the origin to (2, 3,2). Find (a) the unit vector

Vector A extends from the origin to (1, 2, 3), and vector B extends from the origin to (2, 3,−2). Find

(a) the unit vector in the direction of (A − B);

(b) the unit vector in the direction of the line extending from the origin to the midpoint of the line joining the ends of A and B.

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