Answer :

Let P(x1,y1,z1) and Q(x2,y2,z2) be the two points then Direction ratios of line joining P and Q i.e. PQ are x2 - x1,y2 - y1,z2 - z


Here, P is(1, 5, 4) and Q is (4, 1, - 2)


Direction ratios of PQ are:(4 - 1),(1 - 5),( - 2 - 4) = 3, - 4, - 6


Ans: the direction ratios of are: 3, - 4, - 6


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