Determine whether u, v and w lie in the same plane when positioned so that their initial points coincide (a) u =< 5, −2, 1 >, v =< 4, −1, 1 >, w =< 1, 1, −1 >. (b) u =< −1, 2, 4 >, v =< 3, 4, −2 >, w =< −1, 2, 5 >.

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