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True/ false a- If the last row in an REF of an augmented matrix is [0...

True/ false

a- If the last row in an REF of an augmented matrix is [0 0 0 4 0], then the associated linear system is inconsistent.

b-The equation Ax=b is consistent if the augmented matrix [A b] has a pivot position in every row.

c-The set Span{v} for a nonzero v is always a line that may or may not pass through the origin.

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