3.T(x, y, z) = (x+y, x − y, z− x) Answer 4. T (x, y) = (5x + y, 0, 4x - 5y) 5. T (x, y, z) = (3x − 2z, 2y - z) Answer 6. T (x1, x2, x3, x4) = (0, 0, 0, 0)

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