Question: Show that B = {(1, 2, -1), (-2, 1, 1), (1, 2, 1) } is a basis of R3 by finding the unique representation of

Show that B = {(1, 2, -1), (-2, 1, 1), (1, 2, 1) } is a basis of R3 by finding the unique representation of the vector (a, b, c) E R3 as a linear combination of the elements of B

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