Question: If A and B have position vectors (1, 2, 3) and (4, 5, 6) respectively, find (a) The direction vector of the line through A

If A and B have position vectors (1, 2, 3) and (4, 5, 6) respectively, find

(a) The direction vector of the line through A and B;

(b) The vector equation of the line through A and B;

(c) The cartesian equation of the line.

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