In the following sets of vectors, determine whether the first vector is a linear combination of the other vectors. (a) (3, 15, -4); (1, 2, -1), (2, 4, 0), (5, 1, 2) (b) (-3, -4, 7); (5, 0, 3), (2, 0, 1), (4, 0, 5)

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