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1. Suppose that V = Span 1221 6 500 which is a subspace of R4. Determine with justification whether each of the following sets

1. Suppose that V = Span 1221 6 500 which is a subspace of R4. Determine with justification whether each of the following sets is a basis for V. (a) A= (b) B = (c) C = 1221 126 100 1123 112 3 123' 0122 0122 0122 1221 1221 (d) D = 1123 0122 1221 0 w I 2. Suppose that U = R4:4y+3x+2w = z and 2z+x=w Determine with justification, Y whether U is a subspace of R4.

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