Find the value of `p `for which the line through the points `A(4, 1, 2)` and `B(5,p,0)` is perpendicular to the line through the points `C(2, 1, 1) `a
Find the value of `p `for which the line through the points `A(4, 1, 2)` and `B(5,p,0)` is perpendicular to the line through the points `C(2, 1, 1) `and `D(3, 3,-1).`
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