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  3. if a is a 5 x 7 matrix with rank 3, which one of t

If A is a 5 x 7 matrix with rank 3, which one of the...

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Algebra

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If A is a 5 x 7 matrix with rank 3, which one of the following statements is true:A) The column space of A has dimension 2.B) The row space of A has dimension 4.C) The null space of A has dimension 4.D) Ax = 0 has only the trivial solution.E) A- can be written as a multiplication of elementary matrices.

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